I have exactly the same problem with the kernel 2.6.2 and the Nvidia drivers 5336.
I also tried with --kernel-name=2.6.2, and I get exactly the same error.
So I tried insmod, the module can't be load maually because of a gcc version mimatch: i used gcc v2.95 to compile my kernel, i've actually the version 3.3.
I tried export IGNORE_CC_MISMATCH=yes before compiling the module , i get the same result.
i use linux debian sid and my vidoe card is GeForce FX5900XT.
Can someone help me?