Ok I have compiled 2.4.19 and replaced my old kernel 2.4.18
(standard kernel tahat is installed with slackware 8.1) and I got this error when I tried to install NVIDIA_kernel-1.0-3123.tar :
So I switched to my old kernel 2.4.18 and installed the driver and it worken fantastic. But then I replaced 2.4.18 kernel with 2.4.19 and I get this error when I try to start kde:
Failed to initialize the NVidia kernel module !
(nvidia script said that it was the right kernel for me)