that could be caused by not being root, regardless of what people say to compile a kernel as a normal user thats a lie.
go to http://dictatornet.cjb.net/~AutOPSY
at the bottom left are links,
the first one is a download of 2.6.3
the second is a download of gcc-3.3.3 and other utilities regarding compilers.
the third is module-init-tools.
my version of make used to compile 2.6.3 was:
GNU make version 3.79.1
if your version is the same or better, reget the kernel source as it was probably a corrupt download.