Radeon 9250 - can't get glx, 3d support

HI
I've recently installed drivers (version 8.20.8 ) for my ati radeon 9250 card (all modules were loaded properly), however after configuring XF86Config-4 xserver starts but 3d grafic is not supported properly (glxgears 78 FPS :( while on gforce2 1350 FPS ). In the xserver log I found those lines:

Code:

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(II) Primary Device is: PCI 01:00:1
  (WW) fglrx: No matching Device section for instance (BusID PCI:1:0:1)
  found
  (EE) No devices detected.

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my kernel version is 2.6.11-4 Xfree 4.3.1. any ideas or similar problem?
maybe changing from xfree to xorg would help ??