I'm having trouble with my drive side window. I replaced the window regulator and the window switch, but my window still won't roll down. The passenger side rolls up and down no problem. Any suggestions?

 

do you mean the passenger side window rolls down via using the master switch on the drivers door or via the switch on the passenger door?
either way the first thing I would check is if you have current to the window motor and the switch. Could be a wire broken, ive seen several broken wires inside the boot where the harness passes into the door from the body.