They will never pay you, with have been dealing with this for the last year.  The person handling all of the invoices is Steve Rosbel and he does not know what he is doing.  He always says you need to talk to "so and so", and then that person says you need to talk to Steve.  We sent our last invoice to them and they emailed back saying what they were and were not going to pay.  That was 3 months ago still haven't gotten any check.  I am sure they get a paycheck every week without having to fight for it!