Raul, on your IPAQ you will need to check what the outgoing bluetooth serial port is. Go into Start > Settings, and on the Connections tab there should be a Bluetooth icon. Open this up, and look for something referring to a Serial Port service, COM Port, etc. (depending on your bluetooth drivers the exact wording may vary.) You may see both an Incoming and and Outgoing COM Port, whatever the outgoing port is, is what FieldGenius needs to be set to.