I have a Team Foundation Server 2012 installation with Power Tools, and I defined a backup plan using the wizard found in the "Database Backup Tools" in the Team Foundation Server Administration Console. I set the backup plan to do a full database backup on Sunday mornings, to another server in the network. I followed the wizard with no problems and the Backup Plan was set successfully. However when the backup runs it returns Error as result and when I go to the log file I only get the header and no further info:

[Info   @01:00:01.078] ====================================================================
[Info   @01:00:01.078] Team Foundation Server Administration Log
[Info   @01:00:01.078] Version  : 11.0.50727.1
[Info   @01:00:01.078] DateTime : 11/25/2012 02:00:01
[Info   @01:00:01.078] Type     : Full Backup Activity
[Info   @01:00:01.078] User     : <backup user>
[Info   @01:00:01.078] Machine  : <TFS Server>
[Info   @01:00:01.078] System   : Microsoft Windows NT 6.2.9200.0 (AMD64)
[Info   @01:00:01.078] ====================================================================

I can imagine it's a permission problem, but I have no idea where to start ... Can anyone help?

Thank you for your time!

EDIT

I'm not sure if it is related, but I logged in with "backup user" in "TFS Server" and there was this crash window opened with "TFS Power Tool Shell Extension (TfsComProviderSvr) has stopped working".

The full crash log is here:

Problem signature:
  Problem Event Name:   APPCRASH
  Application Name: TfsComProviderSvr.exe
  Application Version:  11.0.50727.0
  Application Timestamp:    5050cd2a
  Fault Module Name:    StackHash_e8da
  Fault Module Version: 6.2.9200.16420
  Fault Module Timestamp:   505aaa82
  Exception Code:   c0000374
  Exception Offset: PCH_72_FROM_ntdll+0x00040DA8
  OS Version:   6.2.9200.2.0.0.272.7
  Locale ID:    1043
  Additional Information 1: e8da
  Additional Information 2: e8dac447e1089515a72386afa6746972
  Additional Information 3: d903
  Additional Information 4: d9036f986c69f4492a70e4cf004fb44d

Does it help?

Thanks everyone!