I guess Nvidia must have changed their driver numbering. Is this the version you are using?
http://www.nvidia.com/download/drive...px/52335/en-us
Version: R304 U4 (307.45) WHQL
Release Date: 2012.11.19
Operating System: Windows XP
CUDA Toolkit: 5.0
Language: English (US)
File Size: 115 MB
Peter