i am trying to setup a cell phone transfer from a users voicemail. it is a 3300 4.1, embedded voicemail. when i call the ext # from a another ext # on 3300 i get the persons vmail, it say press c to transfer to this persons cell phone. when i select 2 it says the ext is not available. i have the number programmed as 9 xxx xxx xxxx. i can call the cell phone from any ext on system, so i know it is a valid number. i couldn't see anything that stood out in the class of service. any ideas?