HP 5555 + Navman 3450 = blocked port?

[Thaedson]

I have an HP5555. Recently purchased a Navman 3450 now that they are "reasonably" priced. The navman worked great UNTIL I used my IPAQ in conjuction with the wireless network at home. After that I slipped it into the Navman case and got the message GPS port blocked.

I tried resetting the port on the Navman software - it likes Port 4 and I could not get it to work on any of the others.
I rebooted and still had that problem.
I then re-synched using the cradle and that cleared up the problem, course now the wireless doesn't work...

Any suggestions of something I can change here?
Anyone aware of a Navman forum where this might be discussed?

Thanks for the assistance.