I recently re-installed MAS90 onto a Windows NT Server machine and when I start the program, I get an error message saying "Cannot open ACTIVATION key file" and then "NO VALID ACTIVATION FOUND!!". The program was installed from licensed disks and when I go to the 'Pvxwactv.exe' icon, the activation information is filled in, including the serial number. The version I'm running is 3.52d. Any help would be greatly appreciated.