I just installed LLMS on a Windows 7 laptop and the GUI comes up, I can hit play and see the progress bar moving across the tracks...but now sound.

I downloaded a small MIDI file and can't hear that either.

However when I go to the COVERS folder and double click on CapDan-Infinity2010.mmpz...I hear a helicopter type of effect as the progress bar moves through time.  The various instruments begin playing when their MIDI clip comes up...same with the samples...but it's all the helicopter type noise.

What am I doing wrong?