Password problem when authenticating with LDAP

[Ravi Kiran]

we are facing problem when authenticating users with blank password in weblogic
6.1 sp3.
I am using iplanet5.1 Ldap server to store the user information.
And using weblogic's LDAPV2 Realm.
any body facing the same problem pls provide the information.

I am giving the stack trace i got when i tried to create the InitialContext by
providing user credentials (password is blank here an empty string).

javax.naming.AuthenticationException. Root exception is java.lang.SecurityException:
Authentication for user ptest denied in realm weblogic

Start server side stack trace:
java.lang.SecurityException: Authentication for user ptest denied in realm weblogic
at weblogic.security.acl.Realm.authenticate(Realm.java:212)
at weblogic.security.acl.Realm.getAuthenticatedName(Realm.java:233)
at weblogic.security.acl.internal.Security.authenticate(Security.java:135)
at weblogic.kernel.BootServicesImpl.authenticate(BootServicesImpl.java:119)
at weblogic.kernel.BootServicesImpl.authenticate(BootServicesImpl.java:210)
at weblogic.kernel.BootServicesImpl.invoke(BootServicesImpl.java:145)
at weblogic.rjvm.RJVMImpl.dispatchRequest(RJVMImpl.java:642)
at weblogic.rjvm.RJVMImpl.dispatch(RJVMImpl.java:593)
at weblogic.rjvm.ConnectionManagerServer.handleRJVM(ConnectionManagerServer.java:168)
at weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:648)
at weblogic.rjvm.t3.T3JVMConnection.dispatch(T3JVMConnection.java:454)
at weblogic.socket.NTSocketMuxer.processSockets(NTSocketMuxer.java:658)
at weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:24)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
End server side stack trace

<<no stack trace available>>
Exception in thread "main"