A problem with Synchronization between PC and 6800

[dopdahtc]

Hi guys, I have a prolem with the sync between PC and 6800 and wonder you may give me some suggestions:

I tried to unlock the HTC6800 so as to upgrade it with a GPS-enabled ROM. Following the instructions, I need to disconnect the cable between the PC and the phone and then reconnect it after the tri-color screen turns out by running the TitanUnlocker. But after the reconnection, they two could not be synchronized any more and the tri-color screen persisted until I run the titan_exitbl.exe.

So could you plz tell me what the prolem is between the PC and the phone? I have tried many times to re-install the ActiveSyn, but it still does not function.

You suggestions are appreciated.