ActiveSync 4.5 problem - need expert!

[OlleB]

I have since some years a Qtek 9100 with WM 5 and ActiveSync 4.5 and ii has been working fine for years. Recently I had to make a hard reset and now I can not reinstall ActiveSync 4.5.
From the beginning the my PC recogniced the PPC (via USB) but said something was wrong with the handheld. The USB port seemed blocled but after connecting to another USB post at least the same thing happened again. By now, nothing happens when I connect the phone to the USB port.

I have tried all tips I can find:
- In Norton 2009 I have created a rule allowing all programs (exe-files) in the AvticeSync folder.
The rule also opens ports 990 999 5678 5721 266675 and 5679 as mentioned in a Microsoft ActiveSync 4.2 troubleshoot document.
- I have stopped the firewall, spamfilter, virus control and connected without success
A couple of strange things are that:
-I cannot (on the phone) see "Connect with USB" (or sonthing like it) at Start-Settings-Connection
- the option Start-ActiveSync-Menu-Options (options are greyed out)

So please, anyone that can resolve this, I am missing meetings forgetting to drive my kids to practice...