Crystal Reports 8.5 and XP SP2

Having a problem with CR8.5 only on the few machines that were upgraded finally to SP2. I get the generic “TNSname Could not resolve service name” error. As i am an admin i do not get it on my machine. I only noticed it when im on as a regular user and try to run a report. Nothing has changed other then the user privledges. Power users if it makes any difference. Uninstalling SP2 is not an option. All ready saw a few suggestions to just go back. That doesnt solve the problem, atleast not for me. Any input would be greatly appreciated.