Cannot Open Activation Key File - No Valid Activation Found - I have this scenarios with 2 clients (1 on 4.3, 1 on 4.4), both MAS 200. I use RDP or RDS (whatever) to access their MAS200 servers (Windows 2008 R2). There are plenty of licenses available. The parent folder to MAS90 gives all users full control. When logged in as me, I can create a text file in the Keys folder. What am I missing?