duration billsec

Hello list,

               I'm having troubles implementing the ${CDR(duration)} & ${CDR(billsec)} variables in this scenario:

               PEER CALLS OUT ->
CALL GOES TO PEER'S DEFAULT OUTGOING CONTEXT ->
THE CALL IS SENT TO A MACRO AND GOES IN HANGUP ->
THE CALL RETURNS TO EXTENSION h OF PEER'S DEFAULT OUTGOING CONTEXT (here I'm trying to print the variable)

               The problem is I'm always getting '0' from those variables. The incoming calls aren't passing through a macro and they return the correct billsec/duration value.

               cdr.conf has this enabled: endbeforehexten=yes

               asterisk version: 1.6.0.20

               Any ideas, clues, suggestions on how may I get this to work?

Thanks in advance,

Alex