On Remote Desktop, does not allow network printers to be set

Steps to reproduce:
1. Use Remote Desktop to connect to a Windows computer (tested with Windows 7 Pro x64)
2. Run the program
3. Choose a network printer (i.e. named `\\computer\printer`), and hit the Set as Default button
4. The default does not change.

The user *can* open the Printers folder, right-click the same printer, and choose *Set as Default* with no issue.