I took the following directly from the Garmin site - FAQ.
Hope this is the solution for you.
Q. I am using a GPS 10 with my Pocket PC and the maps I loaded do not show up in the Que program. I am sure the maps are loaded because I can see they are taking up memory space. How can I get the maps to show up correctly?
A. The first step to fix this issue will be to update the Que operating software on the PDA.
The software can be downloaded from the following link:
http://www.garmin.com/support/agree.jsp?id=837
Once the software has been updated, please turn on the PDA and run the Que program. The software program will open and then it will ask which device to connect to for GPS signal. Please confirm that the GPS 10 unit is powered on at this time. Select the GPS 10 from the list and the software will pair with the GPS 10. The software should work properly and the maps will be viewable.
Good luck
