SIP Xlite not Online

I made the asterisk server in virtualbox, continue trying to access on the host computer. Connections use the bridge, I’ve made a SIP Extension her, I tried to call from XLIte, SIP that I have listed his status asterisk are not online at his XLITE.

my code SIP :

; #### Extensions ######
[101]
type=friend
secret=asterisk
disallow=all
allow=ulaw
host=dynamic
context=default
qualify=yes