[plug] xserver sarge kernel problem

[Greg]

Hi People

I have recently become the proud father of a libretto.I installed  
2.4.18 kernel  xwindows and xdm . performed a dist-upgrade and xwindows 
still worked ok . tried a  2.6.8-2-386 kernel image and xserver borks.

Failed to load module "xie" module does not exist
Failed to load module "pex5" module does not exist

if I boot into the 2.4 kernel it works ok

any ideas ?
was considering trying a different kernel

Greg