asterisk users - Jan 2005 - voice output

hi list,
im using xlite softphone clients in the windows box, and i can make a 
call (connection) in each other, but im wondering why is that i cannot 
hear any voice from client's end (vice-versa), i already checkd the 
volume of the speaker, is there something missing in the configuration 
file of asterisk or in the xlite config??
Thanks in advanced

-mike

-- 
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Mike S. Lacanilao, msl@cybees.com, mike.lacanilao@gmail.com
Hyperion System Group (Globalink Corp.)
Registered Linux User: #242093
GPG public key:        0xDE01A745
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"Not by might, nor by power.. but by Spirit, says the Lord"

> i cannot
> hear any voice from client's end 
This is a common problem if you are using NAT (behind router)

Google for "asterisk one way audio"

and take a loog here 

http://www.voip-info.org/wiki-Asterisk+SIP+NAT