Instalar VMWare con kernel 2.6.21

[xve <xve@zonaweb.info>]

Hola a todos, estoy intentando instalar VMWare-server 1.0.3 sobre Debian 
Testing (lenny).
El problema que tengo, es un error del qual no encuentro documentación, y no 
se si es porque ma falta alguna opcion en el kernel... adjunto el error de 
compilación:
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Building the vmmon module.

Using 2.6.x kernel build system.
make: se ingresa al directorio `/tmp/vmware-config8/vmmon-only'
make -C /lib/modules/2.6.21.5/build/include/.. SUBDIRS=$PWD SRCROOT=$PWD/. 
modules
make[1]: se ingresa al directorio `/usr/src/linux-2.6.21.5'
  CC [M]  /tmp/vmware-config8/vmmon-only/linux/driver.o
  CC [M]  /tmp/vmware-config8/vmmon-only/linux/hostif.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/cpuid.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/hash.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/memtrack.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/phystrack.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/task.o
  CC [M]  /tmp/vmware-config8/vmmon-only/common/vmx86.o
  CC [M]  /tmp/vmware-config8/vmmon-only/vmcore/moduleloop.o
  LD [M]  /tmp/vmware-config8/vmmon-only/vmmon.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /tmp/vmware-config8/vmmon-only/vmmon.mod.o
  LD [M]  /tmp/vmware-config8/vmmon-only/vmmon.ko
make[1]: se sale del directorio `/usr/src/linux-2.6.21.5'
cp -f vmmon.ko ./../vmmon.o
make: se sale del directorio `/tmp/vmware-config8/vmmon-only'
sh: line 1: 25209 Violación de 
segmento   'insmod' -p '/tmp/vmware-config8/vmmon.o' >/dev/null 2>&1
Unable to make a vmmon module that can be loaded in the running kernel:
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.
--------------------------------------------------

Gracias anticipadas

-- 
xve