I developed a Windows service which is running without any problem in Windows XP service pack 3. When I deployed this service in Windows Server 2008 it is not working. The service started without any problem.
I enabled the option Windows XP service pack 2 from the compatibility property of the .exe which deployed there.
But no more action after the starting the service.
What could be the problem?
Since the error could hide anywhere I would suggest to first discern what exactly is not working under Windows Server 2008.
Implement some logging functionality into your service (if you didn't do so already, I strongly recommend it) and let the result be printed into a log file. See what's working and when it stops to work. Hopefully this will give you a better understanding of what's going on under the hood.
Also, this way we can help you way better than now.
[EDIT]
Maybe these two can help you?
One thing I would check it to see if any of your referenced assemblies are 32bit specific. We ran into a similar problem when using Microsoft SQL Server Reporting Services. The .dll we used to get a list of the web service interfaces, was 32bit/64bit specific, so we had to swap it out depending on which envionment we were running on.