good call guys, if you look closely at the parameter listing, for 52 and 56, it does say in the table floors served,, 2 which would be a value of 2, but this would only be for the 2nd floor, floors served 1 and 2, would be a value of 3. missed that one. also if you look closely at the factory preset value, there are 2 values with asterisks next to them if it is a dmc1-A, factory preset would be 003 which if you did not change when you started, would have probably saved you a headache. thats a good one, guess you have to pay close attention to the details.