Belt squeak that I can't figure out

[csb#356]

I'll start out by saying that I have a brand new alternator and its a brand new belt. Ok when I turn my heater on the belt starts squeaking uncontrollably and when I turn it off its fine. So if I tighten it up at all it starts making a hissing sound like its too tight. The belt runs around the alt, water pump, and crank pulley. It looks like its in line with the water pump pulley but I can tell that the alignment is off a little bit with the crank pulley. So can I get a shorter belt and run it just around the alt and water pump? Because the power steering belt still goes around all three. I really need some ideas because I have never heard an engine that makes this much noise and I just can't seem to figure it out.

Any and all suggestions will be tried. Thanks