Change user templates path in Word 2007

I can not change the User Templates path in "File location…".

It simply refuses to change to anything different.
My goal is to set the path to a templates folder on the server e.g \myserver\folder\templates.
Although, choosing a different local path does not work either. It simply does not respond/react and keeps the default path.

Can you offer any assistance?

(The screenshot is not from a client-computer of mine. I live in Denmark. I did not want to confuse you with danish screenshots.)

Some info:

Client computers:

• Windows XP SP3
• Microsoft Office 2007 OEM (Updated to SP2)

The problem goes for all my client computers. I work for a small sized company with 30 computers. We are slowly upgrading them to Office 2007 from Office 2003 – and this is one of the problems I am facing. So far, the only computers with Office 2007 is completely new computers with Microsoft Office 2007 OEM (updated to SP2). This will only happen for our really old computers though. The others will simply just receive an upgrade-license…