Originally Posted by negboy
i have this problem with my compiled kernel version 2.6.25 .
im sure that the header package is installed.
plz help us.
Well, OP seems to be gone, but maybe we can help you.
First, be sure that you have the headers for your exact kernel version. (I just went into /usr/include/linux and realized I did not know how to confirm this.) If in doubt simply install again. (I always install the full source).
Next, you have to be sure that a complete build environment--compiler, libraries,. etc. is in place. Distros often have a package called "build-essential".
Finally, post here the exact error messages that you get.