I had a similar problem with my unit when new. Broke both keys trying to get the lock to move (my work computer was in the coach and it was Sunday afternoon
), ended up having to get the lock drilled the next day. IIRC, the locksmith said something about the type of lock used in RV's, they are not made very well and can drop a portion of the lock out of place and make them unusable. Took the locksmith about 20 mins to get the lock drilled and warranty replaced the lock plate and paid the locksmith bill.
TV, 2000 Dodge RAM 2500 Quad cab short bed, Cummins 5.9, Edge Comp, Gauges.
5ver, 2011 Palamino Sabre 31 RETS.