Is that old monitor a crt one? If it is you can try forcing it to run at an higher resolution than the maximum one reported by your graphic card. Anyway, what resolution are you using? 800x600? And what's the maximum resolution that you can choose on Windows and Rose?
Yes Crt. My cat has a big bum. He likes to swing his tail across my screen at the most inconvenient of times. Oh! Im digressing.
Im using resolution in game 1280x960 and in Windows 1280x720 I tried to change the resolution few days ago ingame but the game crashed.