As stated above check your fuses, if good then check for power and groung at the drivers switch since power to all doors go through the drivers switch. if you have power at the drivers switch then move to passenger side switch and check for power and ground. Check continuity between the switches on the power and ground circuit. If there is no power or ground and no continuity then take apart the harness at the drivers door at the a-pillar and look for a broken wire. Wires tend to break with the opening and closing of the drivers door. I may be wrong but i beleive the wire is a 10ga brown in color, it has been almost 4 years so forgive me if i am wrong.
