UBUNTU 10.04 AMD64 - after install not working

[n8temp1]

i changed the driver because it didnt work very well
to: ati-driver-installer-10-8-x86.x86_64.run

now there is a problem

nir@Nir:~$ vdrift
INFO: Multi-processor system detected. Run with -multithreaded argument to enable multithreading (EXPERIMENTAL).
INFO: Starting VDrift: 2010-07-24-full, Version: , O/S: Unix-like
INFO: Home directory: /home/nir
INFO: Settings file: /home/nir/.vdrift/VDrift.config
INFO: Data directory: /usr/share/games/vdrift/data
DATA_DIR: /usr/share/games/vdrift/data
INFO: Log file: /home/nir/.vdrift/log.txt
INFO: The last VDrift startup was unsuccessful.
Settings have been set to failsafe defaults.
Your original VDrift.config file was backed up to VDrift.config.backup
INFO: SDL initialization successful
INFO: SDL video query was successful
INFO: Disabling antialiasing
X Error of failed request: BadLength (poly request too large or internal Xlib length error)
Major opcode of failed request: 65 (X_PolyLine)
Serial number of failed request: 13
Current serial number in output stream: 14
nir@Nir:~$