asterisk users - Jul 2013 - Sequence of transfers fail

I have a problem transferring calls multiple times using DTMF sequences (#, *2).

The scenario is:
Transferee    calls         Transferor 1
Transferor 1  transfers to  Transferor 2
Transferor 2  transfers to  Transfer Target

When Transferor 2 enters '#' or '*2', Asterisk no longer reacts
and the call remains with
Transferor 2.

I have tested this with Asterisk 11.2 and 11.5 and there is an entry in the Snom
forum which
seems to describe the same problem with a reference to Asterisk version 1.8.

The transfer problem does not exist when using the REFER/NOTIFY/INVITE way which
most SIP phones
have on-board.

jg

I just got access to an older Asterisk 1.6.2.18 box and found that the multiple
transfer problem
does not exist here. So with 1.6.2.18 I can transfer as often as I wish using
DTMF sequences.

jg