I think it's either a problem with the iPAQ (check which version of ROM you have on it by clicking on START ---> SETTINGS ---> SYSTEM ---> ASSET VIEWER then expand the Version tree and check the ROM Version, latest is 1.00.14 which you can get from
http://h18007.www1.hp.com/support/fi...oad/21095.html ...might fix it) or it's the GPS receiver or the GPS driver used with the medion software so check for updates for that. Which make and model is the receiver?