Cannot modify avast4.ini

Good evening, I need to edit avast4.ini on a Windows2003 Terminal Server, the reason is that I want to add a line in MailScanner section to bring MaxConnection from default (20) to 40.
My problem is that even as Administrator I dont’ have the privileges to do that; even creating a new text file in Avast folder is impossible as the system retturns a “not enough privileges” message.
This problem seems to be restricted to Avast folder and not to other folders relative to SW prodducts under c: \Programs.
I tried to stop avast services and edit avst4.ini but it didn’t work.
Any suggestions?
Many thanks

Gino de Simone

Isn’t it necessary to disable the avast! self protection module?

It works.
Thanks
Gino

You’re welcome.