i have read the parts of trunk and outbound route in the user manuel several times, and i did exactly according to user manule,but i can not dial-out,when i uphook the phone and press the number i want to call,asterisk displays hangup.However, i can get incoming calls.

in custom contexts,i add from-internal
here is my dialplan:
exten =>_X.,1,Dial(dahdi/5/${EXTEN})
exten =>_X.,2,Hangup()

my trunk caller ID:trunk1
i have choosed ports 5

my outbound routing Route:outbound1
Dialing Prefix:0
Pattern:X.
i choose "allow all local extensions to use"

Somebody help me!
Thanks in advance!