This is hard to explain.. but I can't watch two things at once on my dual monitors. For example if I open up media player and then go full screen on a game, media player will be blacked out. Also if I want to have tv on one screen I get the same problem. Any ideas?
Go buy a cheap windows 98 computer for all your music . You might be able to find one for 10-20 bucks.
What kinda hardware are you running? Post your specs, perhaps your system is lacking in a certain area like RAM or video memory.
Some applications are poorly coded, and the programmers forgot that some users might use dual monitors. I have some same problem with some apps.