Cynthia P

I am running Sound Tap 1.4 on Vista Ultimate. I have selected "Listen while recording" and it seems to be working fine except that it is playing through the computer's internal speakers. When I go to the options, the internal speakers are the only ones that show in the selection box - it does not appear to recognize my external speakers, even though I have tried a full shut down and restart. Any clues how to get it to play through the external speakers so I can listen to good quality sound while recording? Thank you for any assistance. -cynthia