HELP -NO SOUND IN INSTRUMENT SLOT

[al urezzio]

I JUST CLICKED ON COUNTRY BLUES STYLE .. WHEN I CLICK ON CERTAIN INSTRUMENTS IN THIS STYLE THERE IS NO SOUND ..THE 2ND DRUM SLOT , THE GUITAR SLOT ETC... HOW DO I GET THE SLOT FILLED WITH AN INSTRUMENT THAT WORKS ... I HAVE HAD NO LUCK TRYING TO PROGRAM FROM SCRATCH , SO THE MORE SIMPLISTIC YOU CAN BE IN YOUR EXPLANATION WILL REALLY HELP ,OR A VIDEO OF IT ...THANKS VERY MUCH ...