Hi Andrea_r, thank you for the quick reply.
We are running the latest version of Multi-DB plugin.
We have several other plugins too, to test if there would be any issue and make sure we can go ahead with an upgrade from WPMU-2.9.2 to WP-3.1, we created another test-domain on the same server and got our original WPMU-2.9.2 in the main site working as it is on the test-domain too and then upgraded the test-domain first, it went smooth and later we also spend few days investigating if all our plugins are working and thus had to upgrade couple of them, then everything looked like it was fine with upgrade from WPMU-2.9.2 to WP-3.1 on our main domain.
Thus we gained courage to repeat what we did on the test-domain and it went smooth too on our main domain except that we cant go to the networks area, kinda stumped here.
