Hi Carlos,
The Chat package use a Java CHat Server. To make it work, you need a JRE on server machine, compile all .java archives in the folder /packages/chat/java, put the path of JAVA/bin on the nsd-postgres. Perhaps one proxy between the computers blocks the comunication, the default port is 8000, then use the HTML chat client.
To start Java server use the command: java -classpath [acs_root_dir]/packages/chat/java adChatServer start 8000 (this procedure is in /chat/tcl/chat-procs.tcl
ad_proc -private chat_start_server )
