installing Postgres 9.0 beta 3 fails on windows 2003 32bit

Hi,
I am testing Postgres 9.0:
I installed it on:
- Win2008 64bit ( the 64bit version) - no problems
-Win2003 32bit ( the 32bit version) - no problem on one machine, problem on another machine of the same configuration

On the problem machine:
Error: Problem running post-install step. Installation may not complete correctly The database cluster initialisation failed.
The Data folder is empty
There is no error log in the temp folder
The only thing I can see is an Error in the Even Viewer that says: Faulting Application postgresql-9.0.0-beta3-windows.exe, version 1.0.0.0, faulting module TCL7.tmp, version 0.0.0.0, fault address .....

What prevents the initialization on the faulting machine? It has to be something on my machine rather than the installer since it works on one machine as opposed to the other.
Thank you,
Kasia