[asterisk-users] video call doesn work

[gmail]

i am trying to make a video call on asterisk 1.6 , my configuration is an
-  asterisk 1.6 on Centos on virtual machine VmWare
-  Xlite softphone one windows xp (the Host operating system)
-  X-lite client on another windows XP (the Guest operating system )

i put the paramter    videosupport=yes   under the general section  in   sip.conf
i allowed the video codecs for each client in sip.conf for the clients 3500 and 3501 

i installed 2 web cams one for each client , and in the X-lite video side-window each cam operate well on its corresponding X-lite client in the down part, and when i start a call from 3500 to 3501 and the call established and i press the send video button  on both clients , but the video stream is not sent to any of the 2 clients 
what's wrong?
am i missing something? or does the VmWare enviroment cause the problem and i need 2 seperate physical machines 

Gres
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20090625/a89a90e4/attachment.htm