Playing Red alert 3 with bluetooth headphones

Hi,

so I installed my RA3 again. Back then, I used to play it on Win XP without headphones, but now I have a Win7 using bluetooth headphones. Using these headphones has been alright with any game, but when I started RA3, the sound in the headphones went awful - the volume was low without bass and with some sputtering noises. Sound like running mono instead stereo. When I use speakers, the sound is allright.  Any clues?