I installed the Catalyst upgrade 11.2, I was still showing my old version 10.5 ??
I logged out kde4, and went into console mode ctrl-alt-F1 and ran
aticonfig --initial -f
and back to kde, still showing old version.
I rebooted to safeboot and ran the command which worked and now shows correct version.
Possibly logging into console mode still left an active X session, maybe would have worked
if I killed the process, but I'll remember your solution, thak you.