Anyone have the same problem?

When I have PW going, If I switch the game window to change my music or whatever, when I go back into the game window, my mouse wont work, if I click anywhere in the window it switches my game window and puts me back at my windows screen. So eventually I have to close the game off and log back in if I want my mouse to work. Anyone know how to fix this?

Thanx a bunch! b:victory