Remote Registry Permissions Error

I'm trying to access the registry on another computer on my domain via an ASP.NET application. I'm using impersonation and am using an account with domain admin permissions. It works on some computers, but on others I still get the "Requested registry access is not allowed" exception. I checked and the "Remote Registry" service is running on the remote machine. Any idea what else might be blocking it? I can go over and login to the machine with the domain admin account just fine. Thanks!

What LogOn account is the service running under on the PC's that are blocking (i.e. Local System Account or another account)? Can you post the exception that you get?

The same account as the on the PC's that are working properly..."NT AUTHORITY\LocalService". The exception is a permissions error. I've move on to a different method, and I don't remember the exact error. Thanks for the reply.