niallb wrote: You need to rm /usr/src/kernels/2.6.15-1.2054_FC5-smp-i686/build What is /lib/modules/2.6.15-1.2054_FC5smp/build currently pointing to? let us know what ls -l says. You have another problem though. You seem not to have a C compiler installed. Try installing gcc using your distribution's package manager. Good luck, NiallB