[idvusers] Collaboration feature

In Training Workshop, I found IDV has collaboration feature. So i try the 
feature using the following commands, but there are nothing diffirent from 
normal.

Server: 
runIDV -server -port 8080

Client:
runIDV -connect xxx.xxx.xxx.xxx -port 8080

xxx.xxx.xxx.xxx is ip address of server.

Are there have some problem in the above commands?

Thanks for your help!