Dual Cards Extended Windows

[Chrisolly]

I run a karaoke show with computer monitors. One monitor for my computer for me to work from (Primary Monitor), One monitor for the singers to sing from and one monitor for the audience to see (Secondary Monitors). Both Secondary Monitors are Computer Monitors and run in windows extended display mode, and when playing they only show the words. This works beautifully with the Radeon 9250. However some bars I go to have TV Monitors which means I am able to connect my S-video out from my ATI 9250 directly into into the AV socket at the back of there TV monitors then set there monitors to AV. This also works but the problem I'm having is that the singers monitor is a Computer Monitor and when I go to settings within the display panel and switch to TV Monitor my singers computer monitor goes blank if I then switch to Computer Monitor the TV monitor goes blank. Is it not possible to have the TV Monitor and the Computer Monitor on at the same time in windows display extended mode.

I'll be grateful if anyone has a solution to this problem.

Christian