What is the location of the directory of C header files that match your running
kernel? [/usr/src/linux/include] /usr/src/kernels/2.6.18-8.1.4.el5-i686/include

The directory of kernel headers (version @@VMWARE@@ UTS_RELEASE) does not match
your running kernel (version 2.6.18-8.1.4.el5).  Even if the module were to
compile successfully, it would not load into the running kernel.