my version of AS4 won't let me select the com port i want to use with activesync. it lets me select the fact that i allow serial connections, however the selection is grayed out and IR is in the window. does this mean that i can only use IR or does it automatically try to find the right com port? or am i just hosed?

Ipaq hx4700
X5 Advanced PXA250 - WM2003
Mugen 3800 Battery
Fortuna BT Clip on GPS - Ambicon BT2000
1GB PQI SD