Cannot install per user apps

Hi

I'm trying to deploy an "Per User" application on Windows Server 2012, via login script:

msiexec /i C:\path\Install.msi /qn

But it fails when users are logging in: Installation success or error status: 1640.

Also when I install this with my administrator user, I cannot uninstall it again:

Only administrators have permission to add remove software during terminal services remote session

Only via the console can I uninstall it.

DisableMSI = 0 (without this administrator can't install anything)

DisableUserInstalls = 0 (Set via GPO, does not seems to do anything different for the user)

Without DisableMSI = 0 , the user get error 1625.

What is wrong? :-)

/Kim