I have a similar problem on my '05. The drivers' window will go down, but not up. I replaced the regulator, removed the motor and tested it on the other door and it worked, and swapped the left switch for the right switch. It also worked. Is there a clicking noise when you press the button? There is on mine. Something seems to be faulty between the switch and the motor. If anybody is familiar with this, please let me know. This may help us both.

Thanks