BlackBerry Enterprise Server, Firewall configuration

I have a Windows 2003 server that I have installed the latest version of Blackberry Enterprise Server on. Everything worked fine for the first day. I now connect get a connection to the Blackberry infrastructure. I believe it is a problem with the firewall. I cannot telnet out the port that the BES uses. The firewall is Internet Security and Acceleration Server 2004. If you are familiar with this type of firewall and or installing a BES please reply. I am looking for somebody to assist tonight