xcacls.vbs + Server 2008 = RPC server is unavailable

I wanted to make a post in case anyone else comes across this problem. I had been using xcacls.vbs in a PowerShell script for most of the summer fine and then I started getting error stating that RPC server is unavailable. It took me a little while to realize that in the interim I upgraded the server that I was using xcacls.vbs against to Windows Server 2008. By default the Windows Firewall is turned on, and I recommend leaving it on. Anyway to resolve this issue go into the firewall config and enable the rule for Remote Administration (RPC).