Thats great skk81, exactly what I was looking for.
What Firewall do you use?
If you only use the built in Vista Firewall, then please check out this page on how to allow a program through the Firewall
How to allow a program through the Windows Vista Firewall - Simple Help
The program you are looking for is in the windows\system32 folder and the name is verclsid.exe
regards
Steve