okay in form 3 make sure Call Forwarding External is Enabled in the CONSOLE Class Of Service and the COS of any other phone you want to be able to transfer the call. IN the same COSs also enable options, 314, 315, 316, 317, 318 (because I don't know what kind of trunks you are dealing with there). It should be as simple as that if you have the other things enabled that you say you have enabled.
