Trouble with lyrics after upgrading to Window 7

[EmilioM]

Hi everyone,
Wanted to know if anyone has ran into this problem. I upgraded from Vista Home Premium to Win 7 Home premium Tuesday March 30th. The 31st I reinstalled Hoster 4.20 and Microstudio and opened Hoster up to play some music on it to make sure everything was alright for this coming weekend, and when it started, the Chartbuster opening page had marks all over and when the lyrics came on they first looked alright then as the bars on top counted down, the letters and immediate vicinity turned black. As it was sweeping, and you could tell it was sweeping across the lyrics because of movement in the black areas, the Chartbuster page would appear but it was broken up with marks on it. On the second stanza it did the same thing except the lyrics did not appear, it was just black. I went to the manual to make sure all the changes were done correctly that you have to have before you install Hoster, and there were a few things I had to change, then I reinstalled Hoster, and still got the same results. Does anyone have any insight as to what I need to do to get this right before I have to play this Saturday?