Sounds like you have 2 potential unknowns. From the sound of it, this is the first time you are using windows 7 and PBP. The second could be miss-wiring of the LCD. Try just getting an I/O port to turn on and off in a loop to make sure your MCU is actually running code. Put an LED or scope probe on portB.0 make sure your TRISB is set to digital output on bit 0.

Main:
portB.0 = 1
pause 1000
portB.0 = 0
pause 1000
goto main

If the above runs, then recheck your LCD.

Nick