Need help with laptop and tv display

[Ernie]

I have XP and Hoster 507.05. I have a dedicated laptop for Hoster, Microstudio and Keyrite. I was having a lot of trouble with Hoster, so I put the laptop back to the way it was when I bought it. After that, Hoster was running fantastic. This evening I took my laptop downstairs to set it up for Saturdays party. Before I start, I made all the changes to the laptop before installing Hoster. Now, when I turned on the laptop, the desktop is smaller then the screen. About 1 inch of space on each end and about 2 and a half inches of space on the top and bottom. When I open Hoster, it's the same size!?? When I double click the black screen in the upper right, the whole laptop screen and the tv screen are black. When I double click the black screen on the laptop, it goes back to Hoster and the screen is still small. I've found, the way to play a song is to start it in Hoster, then very quickly double click the small upper right black screen. When I do this, the tv looks all black with the karaoke words playing as they should....But, The whole screen on the laptop looks the same as the tv. Again, I did setup everything on the laptop before installing Hoster. Any Ideas???

Thanks, Ernie