Here is the latest:
I have added the following to the GPO and to the contents of the logon.bat as absolute paths to the necessary files.

\\My Company\SYSVOL\My Company\Policies\{E4124428-4956-482B-A173-F766DF040027}\User\Scripts\Logon\

WXP still does not start the script. I can use explorer to browse to the directory above and launch the script but for some inexplicable reason the scripts do not start automatically. Am I perpaps missing a registry key to get WXP to look for a logon script? TIA.