Sorry for the mistake... this is what I wanted to say: As you can see I have linux-headers-2.6.15-1, linux-headers-2.6.15-686, linux-headers-2.6.15-686-smp, linux-headers-2.6.16-1 and linux-headers-2.6.16-686-smp installed. ./linux-headers-2.6.16-1/include/linux/version.h seems missing. Mau