Hello, i have a little problem, could you help  me please?

I trying to bridge using uuid_bridge API, but doesn't work , and I cant
figure out why, I'll explain you:

I make a Inboud call and run a lua script code, the lua code has this

local UUID  = session:getVariable("uuid");        

local api = freeswitch.API()

local uuid = api:executeString('create_uuid')

api:executeString(string.format("originate
{ignore_early_media=true,origination_uuid='%s',api_on_answer='uuid_bridge
%s
%s'}sofia/internal/189@192.168.1.203
&park",
uuid, UUID, uuid))

The outbpund call is to Xlite phone, and this is ringing but when a
answer the call, the first one is hangup and the second (@203) is still
alive, What happed??????

The uuid_bridge return +OK but inmediatly the first is over

2010-06-21 12:51:45.725585 [INFO]
switch_channel.c:2535 sofia/internal/189@192.168.1.203
api on answer:
uuid_bridge(7a9ab23d-4ea5-4597-84e2-992ee88c2c79
3456ef2d-ec79-43a7-bf72-a1b2e88fc725)

+OK 3456ef2d-ec79-43a7-bf72-a1b2e88fc725 **********Line 765

2010-06-21 12:51:45.725585 [DEBUG] switch_core_state_machine.c:344
(sofia/internal/189@192.168.1.203)
State
RESET
going to sleep

2010-06-21 12:51:45.725585 [DEBUG] switch_ivr_originate.c:3341
Originate Resulted in Error Cause: 487 [ORIGINATOR_CANCEL] *********
Line 780

Please help me, thank you
-- 

Saludos

Arturo Monroy