I have an IPAQ HP HX2110 with a 'non authorised' copy of Tomtom 5. I also bought a 'used' Globesat ( DConnex ) BC307 compact flash GPS receiver off of ebay. I prefered this option as it charges from the ipaq and keeps everything neat and compact. My problem is that I can do a test of the receiver with its own software and get a lock on 4-6 satellites, but it will not lock on with the tomtom 5 software. I have 'unchecked' accept beams, and taken off the Globesat software as I know both of those can confuse things. I have done reboots and manually configured the COM4 and CF device. The blue and yellow circle thing is spinning, indicating that it has recognised the device, but yet it wont lock on. Is the GPS receiver duff, or does tom tom 5 favour certain receivers ?. Any gurus ?.