How can I convince powershell (run through task scheduler) to find my network drive?

Question

I have a simple powershell script on windows 7 that doesn't work properly. (this is not an issue on XP)

get-psdrive

When I run it directly, I get

  Name           Used (GB)     Free (GB) Provider      Root
----           ---------     --------- --------      ----
A                                      FileSystem    A:\
Alias                                  Alias
C                  12.30         11.60 FileSystem    C:\
cert                                   Certificate   \
D                                      FileSystem    D:\
Env                                    Environment
Function                               Function
HKCU                                   Registry      HKEY_CURRENT_USER
HKLM                                   Registry      HKEY_LOCAL_MACHINE
**Q                1486.63        289.41 FileSystem    Q:\**
Variable                               Variable
WSMan                                  WSMan

When I run this through task scheduler, I get

Name           Used (GB)     Free (GB) Provider      Root
----           ---------     --------- --------      ----
A                                      FileSystem    A:\
Alias                                  Alias
C                  12.30         11.60 FileSystem    C:\
cert                                   Certificate   \
D                                      FileSystem    D:\
Env                                    Environment
Function                               Function
HKCU                                   Registry      HKEY_CURRENT_USER
HKLM                                   Registry      HKEY_LOCAL_MACHINE
Variable                               Variable
WSMan                                  WSMan

Note that I'm missing my Q: drive. If there's any way to get this resolved, I'll be able to copy files there....