When someone requests a chat, we can click the Accept button to accept the chat and it opens a new window for the chat, but it just hangs at a whitescreen and never loads.  We are using version 2.1.5 and this is a new install.  Everything else about the program works flawlessly.  I believe it is a port issue as this server has a firewall and blocks all ports unless specified otherwise.  Does anyone know what port HCL requires to make a chat request?  Any other ideas on how to fix this?  Thanks.