If you have a program like WinZip or 7-zip, you can extract the contents of the Monitor Driver from the file sp39950.exe. Then use the Device Manager to update the monitor drivers manually and pointing windows to where you have the extracted files.
Regarding the Cat driver, I simply meant the newest one on the ATI site. Drivers & Support | GAME.AMD.COM
Also make sure that 60Hz is set for the monitors refresh rate as it is an LCD monitor.