I have a 7303 phone with three personal-co-lines and I need to have one of the lines calls transfered to a pot line from 8 to 5. I have call transfer option on this line and it works with a butt set but not when you select the line at the station. The code is 72# and 73#. Can someone tell me what (or if I can) to change to make this happen. I think the switch is not passing the tones to the Co.