2000 pass side door

need some help here, the back pass sliding door lock is stuck in the lower position, if i try and pull it up wont go, if i use the electric it maybe goes up 1/4 of the way. I'm sure its not related, but about 1 month before this the door would open right after it was closed (when using the power lock)

how do you GEt the inside panel off the door?

Rob d