Windows Network GPS Conflicts

Are Geotech unit purchased a few Magellan 400 Explorist 400 North American units that use a conversion manager to exchange data between the unit and the computer. The software will locate the units with an administrator logged on. If the user (power user) is logged on the software cannot located the GPS unit. Uses standard 2.0 usb port. The computer, with out the software running locates the unit as a mass storage device. So all conection are good. Any suggestion. We (my coworker with much more experience and I) have contacted Magellan (India) several times. We are I think black listed with them.
HELP