Unable to see Service Group in NWDS

Hi,

I created some service groups in NWDS and published them to Service Registry. They are now available there and I can see them.

While creating Web Service Model in NWDS, I want to associate a web service to one of these service groups. However I am not able to see them in the NWDS (in the dropdown for existing service groups). The connection to SR from NWDS is working fine.

What could be the problem.

TIA ,

Himanshu