It sounds like you have some mixed drivers on your patforms. Which stack do you use which works on your home computer? If you don't know how to answer that (i.e. Widcomm or Microsoft?), how do you access the other Bluetooth devices (via Control Panel or via Bluetooth Neighborhood?)?
For your sanity you should try to use the Bluetooth stack from the same source on both machines. And you need to make sure the versions of your stacks support the Bluetooth hardware you are using.
Let me know if this helps.