Windows 2000 Logon Script

My network includes a Windows 2000 server and mainly Windows 98 clients. My logon script is a batch file which launches a Windoiws Script Host File. This works on most of my client PC’s however, on a few the batch file will not run. Also I would like to be able to identify the Gruoups that a user is a member of in my WSH Logon script, can anyone help me?