Won't start at all

CONFIG: Using default settings. Create a configfile to change them
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (MIT-SHM)
Minor opcode of failed request: 3 (X_ShmPutImage)
Serial number of failed request: 49
Current serial number in output stream: 50

Is this something a custom config file could fix? I have ATI Radeon 9500 with ATI's driver.
Athlon XP 2700
1GB ram
VIA sound
Mandrake 10.0
v0.61