I just setup my TV out with my Prophet 4500. For some reason I can only set my moniter at refresh rate at 60MHz. This ends up putting lines on the TV screen. Is there anyway I can change it. In the options it only lets me do 60. Also now when I'm not using TV out my moniter can only run at 60 when I was able to run at 85 before I setup the TV out. Any ideas?