Its a very easy problem to take care of.I've sent the solution in another thread but i'll send it here too,afterall nothing's fun enough without sharing it with others..Ok now,Here it is,I'll go through it step-wise..
1: Open application manager and go to uninstall
2: Uninstall MSCIM or SCIM that you have
3: Open X-Terminal
4: sudo gainroot
5: cd /etc/event.d(There's a space after 'cd')
6: ls
7: After 'ls',see if 'scim' is there in that list that comes up,if its there just remove it with the following command.I'll just write it as '8'
8: rm scim
Now type '9' and '10' exactly as i do,
9: /usr/bin/gtk-query-immodules-2.0
10: /etc/gtk-2.0/gtk.immodules
Even if '10' doesnt work,taking care of step '1' to '9' should make the virtual keyboard work.Let me know how it went..