VMware Server 1.0.1 works very smoothly on Fedora Core 5, and vmware-config.pl runs successfully every time I go through a kernel update.

But after I upgraded my system to Fedora Core 6, vmware-config.pl failed to work anymore... Here is the error message:

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What is the location of the directory of C header files that match your running
kernel? [/usr/src/kernels/2.6.18-1.2798.fc6-i686/include]

Extracting the sources of the vmmon module.

Building the vmmon module.

Using 2.6.x kernel build system.
make: Entering directory `/tmp/vmware-config0/vmmon-only'
make -C /usr/src/kernels/2.6.18-1.2798.fc6-i686/include/.. SUBDIRS=$PWD SRCROOT=$PWD/. modules
make[1]: Entering directory `/usr/src/kernels/2.6.18-1.2798.fc6-i686'
CC [M] /tmp/vmware-config0/vmmon-only/linux/driver.o
CC [M] /tmp/vmware-config0/vmmon-only/linux/hostif.o
CC [M] /tmp/vmware-config0/vmmon-only/common/cpuid.o
CC [M] /tmp/vmware-config0/vmmon-only/common/hash.o
CC [M] /tmp/vmware-config0/vmmon-only/common/memtrack.o
CC [M] /tmp/vmware-config0/vmmon-only/common/phystrack.o
CC [M] /tmp/vmware-config0/vmmon-only/common/task.o
CC [M] /tmp/vmware-config0/vmmon-only/common/vmx86.o
CC [M] /tmp/vmware-config0/vmmon-only/vmcore/moduleloop.o
LD [M] /tmp/vmware-config0/vmmon-only/vmmon.o
Building modules, stage 2.
MODPOST
CC /tmp/vmware-config0/vmmon-only/vmmon.mod.o
LD [M] /tmp/vmware-config0/vmmon-only/vmmon.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.18-1.2798.fc6-i686'
cp -f vmmon.ko ./../vmmon.o
make: Leaving directory `/tmp/vmware-config0/vmmon-only'
Unable to make a vmmon module that can be loaded in the running kernel:
insmod: error inserting '/tmp/vmware-config0/vmmon.o': -1 Invalid module format
There is probably a slight difference in the kernel configuration between the
set of C header files you specified and your running kernel. You may want to
rebuild a kernel based on that directory, or specify another directory.
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Do you have any hints on this issue? Thanks a lot~