Issue with LDAP not connecting to IS

We are trying to set up ldap and there is isssues with IS connectvity

The central user mangmnet is connected to IS and its says its configured. We are not able to login with our credential.

Steps followed :
1.LDAP Parameter setup in MWS
2.User, Group, Role setup in mws for the LDAP groups.
3.Central User Management and we are able to see the Central user Management as Configured.
4.Also added the MWS roles to the IS ACLs

Please let us know what we are missing…

The configuration seems to be correct still not able to login to IS…We can login to MWS using the the our credentials and LDAP connection works here.

Wat can be the issue. exhausted all options

do you see any errors in log while connecting?