Group Policy is not taking effect on OU

All,

I am trying to apply a group policy to an OU in Active Directory 2008. For some reason it does not work when linked to just the OU. Here is my setup:

OU contains the computer that the policy needs to apply to and nothing else. The Group Policy is linked to the OU. The overall goal is to have a group policy take effect for users when they log onto a specific computer but not on any of the other computers they may log into.

Is there any method you guys would suggest to begin troubleshooting or if you know what may be the issue please let me know. I have tried several different alternatives to achieving the same result and have had no success.

Thanks,

-Jeff