Need help in sip trunk , "in" direction >>

hi ,

i have sip trunk and its ok and fine when i dial out from it ,

but when somebody call it ,it gives tooot tooot busy tone and seems not working !!!

i have made sip trunk with details as below :

host=208.x.x.x
username=141xxxxxxx
secret=xxxxxxxx
type=peer

===========================
for incoming settings :
context=from-trunk
host=208.x.x.x
username=141xxxxx
secret=xxxxxxxx
type=user

but i cant recive any calls !!!

wish to help

regards