window manager is refusing to start after I enabled restricted drivers for ATI

Binary package hint: compiz

After I upgraded from edgy my system was lagging so much. I figure out it was a graphic driver problem. I was using the "radeon" driver on edgy, and I used beryl without any problems. In order to solve my problem about the slow response and lagging I enabled the restricted drivers. Now the response is actually superb and there is no lagging at all. But the window manager wont start for some reason.

ProblemType: Crash
Architecture: i386
Date: Sun Mar 25 13:04:42 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/gtk-window-decorator
Package: compiz-gtk 1:0.3.6-1ubuntu8
PackageArchitecture: i386
ProcCmdline: gtk-window-decorator
ProcCwd: /home/dame
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 LANG=mk_MK.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: compiz
Stacktrace:
 #0 0xb797b128 in cairo_set_source_rgba () from /usr/lib/libcairo.so.2
 #1 0x0804ead0 in ?? ()
 #2 0x00000000 in ?? ()
StacktraceTop:
 cairo_set_source_rgba () from /usr/lib/libcairo.so.2
 ?? ()
 ?? ()
ThreadStacktrace:
 .
 Thread 1 (process 8368):
 #0 0xb797b128 in cairo_set_source_rgba () from /usr/lib/libcairo.so.2
 #1 0x0804ead0 in ?? ()
 #2 0x00000000 in ?? ()
Uname: Linux makaveli 2.6.20-12-generic #2 SMP Wed Mar 21 20:55:46 UTC 2007 i686 GNU/Linux
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