Map a network printer W7

We have tried to map a network printer via vbscript like this:

Set WshNetwork = CreateObject("WScript.Network")

WshNetwork.AddWindowsPrinterConnection "\\server\print"

Set WshNetwork = Nothing

It works fine in Windows XP, but not in Windows 7. If we run the script with an admin account in windows 7, it works fine, but if we execute it with SYSTEM account, it fails (SYSTEM account is symantec credentials). There is no output error code and we have tried to disable User Account Control.

Any ideas?

Thanks.