diff --git a/ntlm/src/main/java/org/springframework/security/ui/ntlm/ldap/authenticator/NtlmAwareLdapAuthenticator.java b/ntlm/src/main/java/org/springframework/security/ui/ntlm/ldap/authenticator/NtlmAwareLdapAuthenticator.java
index affb43d54a..da5067a09f 100755
--- a/ntlm/src/main/java/org/springframework/security/ui/ntlm/ldap/authenticator/NtlmAwareLdapAuthenticator.java
+++ b/ntlm/src/main/java/org/springframework/security/ui/ntlm/ldap/authenticator/NtlmAwareLdapAuthenticator.java
@@ -3,19 +3,18 @@
  */
 package org.springframework.security.ui.ntlm.ldap.authenticator;
 
-import org.springframework.security.Authentication;
-import org.springframework.security.BadCredentialsException;
-import org.springframework.security.ldap.SpringSecurityContextSource;
-import org.springframework.security.ldap.SpringSecurityLdapTemplate;
-import org.springframework.security.providers.ldap.authenticator.BindAuthenticator;
-import org.springframework.security.ui.ntlm.NtlmUsernamePasswordAuthenticationToken;
-import org.springframework.ldap.NameNotFoundException;
-import org.springframework.ldap.core.DirContextOperations;
+import java.util.Iterator;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
-import java.util.Iterator;
+import org.springframework.ldap.NameNotFoundException;
+import org.springframework.ldap.core.DirContextOperations;
+import org.springframework.ldap.core.support.BaseLdapPathContextSource;
+import org.springframework.security.Authentication;
+import org.springframework.security.BadCredentialsException;
+import org.springframework.security.ldap.SpringSecurityLdapTemplate;
+import org.springframework.security.providers.ldap.authenticator.BindAuthenticator;
+import org.springframework.security.ui.ntlm.NtlmUsernamePasswordAuthenticationToken;
 
 /**
  * Loads the UserDetails if authentication was already performed by NTLM (indicated by the type of authentication
@@ -32,38 +31,38 @@ public class NtlmAwareLdapAuthenticator extends BindAuthenticator {
 
     //~ Constructors ===================================================================================================
 
-	public NtlmAwareLdapAuthenticator(SpringSecurityContextSource contextSource) {
-		super(contextSource);
-	}
+    public NtlmAwareLdapAuthenticator(BaseLdapPathContextSource contextSource) {
+        super(contextSource);
+    }
 
     //~ Methods ========================================================================================================
 
     /**
      * Loads the user context information without binding.
-	 */
-	protected DirContextOperations loadUser(String aUserDn, String aUserName) {
-		SpringSecurityLdapTemplate template = new SpringSecurityLdapTemplate(getContextSource());
+     */
+    protected DirContextOperations loadUser(String aUserDn, String aUserName) {
+        SpringSecurityLdapTemplate template = new SpringSecurityLdapTemplate(getContextSource());
 
-		try {
-			DirContextOperations user =  template.retrieveEntry(aUserDn, getUserAttributes());
+        try {
+            DirContextOperations user =  template.retrieveEntry(aUserDn, getUserAttributes());
 
-			return user;
-		} catch (NameNotFoundException e) {
-			// This will be thrown if an invalid user name is used and the method may
-			// be called multiple times to try different names, so we trap the exception.
-			if (logger.isDebugEnabled()) {
-				logger.debug("Failed to load user " + aUserDn + ": " + e.getMessage(), e);
-			}
-		}
-		return null;
-	}
+            return user;
+        } catch (NameNotFoundException e) {
+            // This will be thrown if an invalid user name is used and the method may
+            // be called multiple times to try different names, so we trap the exception.
+            if (logger.isDebugEnabled()) {
+                logger.debug("Failed to load user " + aUserDn + ": " + e.getMessage(), e);
+            }
+        }
+        return null;
+    }
 
-	/**
-	 * If the supplied <tt>Authentication</tt> object is of type <tt>NtlmUsernamePasswordAuthenticationToken</tt>,
+    /**
+     * If the supplied <tt>Authentication</tt> object is of type <tt>NtlmUsernamePasswordAuthenticationToken</tt>,
      * the information stored in the user's directory entry is loaded without attempting to authenticate them.
      * Otherwise the parent class is called to perform a bind operation to authenticate the user.
-	 */
-	public DirContextOperations authenticate(Authentication authentication) {
+     */
+    public DirContextOperations authenticate(Authentication authentication) {
         if (!(authentication instanceof NtlmUsernamePasswordAuthenticationToken)) {
             // Not NTLM authenticated, so call the base class to authenticate the user.
             return super.authenticate(authentication);
@@ -74,36 +73,36 @@ public class NtlmAwareLdapAuthenticator extends BindAuthenticator {
         }
 
         if (logger.isDebugEnabled()) {
-			logger.debug("authenticate(NtlmUsernamePasswordAuthenticationToken) - start"); //$NON-NLS-1$
-		}
+            logger.debug("authenticate(NtlmUsernamePasswordAuthenticationToken) - start"); //$NON-NLS-1$
+        }
 
-		final String userName = authentication.getName();
-		DirContextOperations user = null;
+        final String userName = authentication.getName();
+        DirContextOperations user = null;
 
-		// If DN patterns are configured, try authenticating with them directly
-		Iterator myDns = getUserDns(userName).iterator();
+        // If DN patterns are configured, try authenticating with them directly
+        Iterator myDns = getUserDns(userName).iterator();
 
-		// tries them all until we found something
-		while (myDns.hasNext() && (user == null)) {
-			user = loadUser((String) myDns.next(), userName);
-		}
+        // tries them all until we found something
+        while (myDns.hasNext() && (user == null)) {
+            user = loadUser((String) myDns.next(), userName);
+        }
 
-		// Otherwise use the configured locator to find the user
-		// and authenticate with the returned DN.
-		if ((user == null) && (getUserSearch() != null)) {
-			DirContextOperations userFromSearch = getUserSearch().searchForUser(userName);
-			// lancer l'identificvation
-			user = loadUser(userFromSearch.getDn().toString(), userName);
-		}
+        // Otherwise use the configured locator to find the user
+        // and authenticate with the returned DN.
+        if ((user == null) && (getUserSearch() != null)) {
+            DirContextOperations userFromSearch = getUserSearch().searchForUser(userName);
+            // lancer l'identificvation
+            user = loadUser(userFromSearch.getDn().toString(), userName);
+        }
 
-		// Failed to locate the user in the LDAP directory
-		if (user == null) {
-			throw new BadCredentialsException(messages.getMessage("BindAuthenticator.badCredentials", "Bad credentials"));
-		}
+        // Failed to locate the user in the LDAP directory
+        if (user == null) {
+            throw new BadCredentialsException(messages.getMessage("BindAuthenticator.badCredentials", "Bad credentials"));
+        }
 
-		if (logger.isDebugEnabled()) {
-			logger.debug("authenticate(NtlmUsernamePasswordAuthenticationToken) - end"); //$NON-NLS-1$
-		}
-		return user;
-	}
+        if (logger.isDebugEnabled()) {
+            logger.debug("authenticate(NtlmUsernamePasswordAuthenticationToken) - end"); //$NON-NLS-1$
+        }
+        return user;
+    }
 }