Didn't Christy just say you couldn't have water in the tank at all?
Did you try cleaning the pump with pure vinegar? Then let it run in a bucket for a couple hours?
EDIT: Ok, am I halucinating, or did Christy not post saying you couldn't put water in the tank at all on page one, and you replied "Yes boss..."??? Am I going mad?
Did that post get deleted? Did she change her mind?