I just replaced my 2616 phone with a 3904. Everything is working fine except that I cannot get my Intercom Key (DIG) to work. The Error I get is 'SCH0360 Wrong number of input fields for prompt KEY'. I have read other posts on this issue, but I do not understand (kind of new at this). I am in a large Intercom Group and the number is 42, how can I get it to accept this?