kernel source missing

[aldo santini <asantini movinet com uy>]

yesterday I had succes upgrading my FC2 with development packages.
Everything seems to work except does programs that need glx. i couldn't
find the kernel-source pkg. I tried "yum install kernel-source" and "yum
install kernel-sourcecode" with no luck. so I can't rebuild my nvidia
driver. does any one knows where I can find it? or this is a known
issue?
thanks 
-- 
aldo santini <asantini movinet com uy>