nvidia module

[andrey.rybak@bilkent.edu.tr]

hi!
if i do command:
# modprobe nvidia
i retrieve next message:

FATAL: Module nvidia not found.

but i have many nvidia-* packages installed
and between them:

ii  nvidia-kernel-common                          20130505+1              
         i386         NVIDIA binary kernel module support files
ii  nvidia-kernel-dkms                            304.88-3                
         i386         NVIDIA binary kernel module DKMS source
ii  nvidia-kernel-source                          304.88-3                
         i386         NVIDIA binary kernel module source

What should i check to diagnose this problem?
thanks for any suggestions.