Whenever I do an attended transfer a call, the caller gets dropped instead of being transferred to the next party. Here are the steps to reproducing the problem:Make a call to a phone that is registered with the FreeSWITCH server.Answer the call.Hit the transfer button on the phone that the call rings on to initiate an attended transfer.Initiate the call to party #3, which is the party that the call needs to be transferred to.Once the call to party #3 is made, hit the transfer button again to complete the transfer.The caller should now be transferred to party #3, but the call drops instead. I am running FreeSWITCH 1.2.12 on the switch where I am experiencing the attended transfer problem. How do I get the call to get transferred from the caller to party #3, and how do I prevent the caller from getting disconnected when a call is transferred?