dual screen subtitle problem
 

Hi , i got a weird problem . i just formatted my pc and upgraded to win 7 64bit pro from win xp , hardware remained the same . I got one monitor where my desktop always is and one TV where i play my movies . usually i get a movie playin in my tv and on my monitor i play online games . after the update though a problem occured . when i have a movie playing in the tv and i start a game in my monitor , the subtitles in the movie stop appearing . when i used bs player in xp i could play my games and movie at the same time with no problem . is there something i must do to prevent my subtitles from dissapearing from the TV ?