nvidia drivers

everytime i upgrade to the latest driver 56.72_winxp2k_english_whql..and i reboot i get a blue screen error stating….
***stop 0x00000007 F (ox00000000, 0x00000000,
0x00000000, 0x00000000) error…can anyone help me with my problem.I have a Visiontek 420mx graphic card