Blue Tooth Adaptor with laptop

I am tyring to connect my pocket PC (H4155) running Pocket PC 2003 via Active
Sycn. I want to connect with bluetooth, and am using a Dongle (BlueTooth USB
adaptor). I installed the adaptor, and it set itself up on COM4 which I then
selected in Active Sycn's connection settings and it connected fine. But
everytime I remove the USB adapter, ActiveSync loses this COM4 setting. Is
there a way to prevent this. When I plug the BlueTooth Adaptor back in it
comes back up in the bluetooth settings on my PC as connected to COM4, but
in ActiveSync, COM4 is longer available. If I didn't need to remove the
adpator it work work the next time, but I'm using a laptop, so I have to use
the Adaptor. I see several others asking about this but I haven't seen any
answer that fixes my problem. Please help, Charlie