e.printStackTrace();
    protected  void fireRetransmissionTimer(    ) {                try {                        // Resend the last response sent by this transaction	    if (isInviteTransaction() && 	        ((SIPTransactionStack)getSIPStack()).retransmissionFilter )                 getMessageChannel( ).sendMessage( lastResponse );                    } catch( IOException e ) {            raiseErrorEvent            ( SIPTransactionErrorEvent.TRANSPORT_ERROR );                    }            }