Problem configuring XFree86

[Daniel]

Hello,

Please can anybody help me with configuring X? After using Xconfigurator I
get following error:

(EE) FBDEV (0): Weight given (000) is inconsistent with the depth (32)
(EE) Screen(s) found, but none have a usable configureation.

Fatal error:
no screens found

When I use fail-safe configuration, X launches normally.

I have PowerMac G4 (with NVidea GeForce 2 MX) and 17" Apple Studio Display.
Graphic card is recognized by Xconfigurator.

Thank you

--
Daniel B