mws directory service

hello everybody,
i have set up one database directory service in MWS. i have followed the approach as described in the MWS documentation.

In the database tables i have inserted some rows for the user.
Now when I am trying to search those users from database directory I keep getting the error in MWS log

Processing request [75e6i0n1fjtz:debashis] http://localhost:8585/meta/default/wm_xt_fabricfolder/0000003302 (GET)
2009-07-28 13:19:55 MDT (portlet : WARN) [RID:5] - Setting returnUrl inside render method is not permitted

Does anyone one know why this error is generated ?