Hoster 5.02 Computer screen words jumbled

[mrmacjr]

Hi I have a dell 2400 desktop with P4 2.8 ghz with 1gb ram running windows xp with Hoster 5.02. When running a show the TV for the singers and audience is fine however on the main computer screen the words are jumbled and do not refresh properly on most songs. when there is an instrumental break in a song the 1st screen back with words is usually fine but after that start jumbling again. I have double checked to make sure all the things for xp were done so that it ran right. Also when I select a song from the search for a singer and hit the enter button or add the song name and singer name remain in the search box. I have three shows and this is the only one that does this. any help appreciated.