Hi Tim,
For your information this version of CUPC is not supported with Windows 7. That means that it might work but has never been tested with it.
What do you mean by contacts greyed out? Do you mean they appear offline ?
The presence information is delivered to CUPC via SIP messages from CUP server and the port range according to the release notes is from 50000 to 50063
There is no known port in the range of 56000 that is used between CUPC and CUP. At least I don't see it in the guide.
Regards,
Christos