unable to change gpib interface id and primary address change with ni max using windowsw 7

I am using Windows 7. I have a GPIB_USB_HS adaptor and I can not change the GPIB Interface ID (Primary address). The NI max says you should be administrator to be able to change (while I am the administrator). The fields are gray and no access to change. 

I do not have this problem with the same adaptor when I use a PC with windows XP.

Please advise.