2003 525i...can't unlock driver door

I'm in a heck of a bind that hopefully someone can help with. I bought a used 2003 BMW 525 3 days ago and much to my surprise I can't unlock the driver door. Here's what I've tried...

1. Tried unlocking with keyless key. It'll lock and unlock the other 3 doors.
2. Tried manually unlocking with the key. It'll lock and unlock the other

1. I tried pulling on the lever to open the door from the inside...doesn't work.
2. I tried unlocking from the switch on the center console. It'll lock and unlock the other 3 doors. Any thoughts on how I go about fixing this problem?

I took the passenger side door panel out and I don't see how I can remove the panel on the drivers side without first unlocking and opening the door. Is this something that can be opened with a slim jim?

Thanks, David