I have a digital Polycom Sound Station 2 Direct Connect to conference. I have set it up as a 2616. I have no documentation on the set. I have AO6 on key 10 (does it have to be on a specific key?). I think all CLS items are set correctly. I place a call, hit the conference button, the first call goes on hold, 'Conference' shows in the display. I do not get another dial tone and if I dial a number and hit conference again, I go back to the original call. Any help would be greatly appreciated. Working off a 61C.