No user is able to login through User Management Engine in SAP Web AS Java

Hi,

We are facing an error"User Authentication failed" in SAP Web AS Java(Stand-alone).

No user is able to login through User Management Engine but we were able to login as administrator into Visual admin.Tried SAP* (Emergency User Activation in config tool) also.SAP* is also able to login to Visual Admin But not into UME.Login in Visual Admin was successful when we tried with SAP* or administrator.

Feels like some UME configuration might have changed.Can anyone help me in this.

Thank You.

Regards,

Sudheer.