Opening Port 1935 In Firewall For All Browsers

I want to configure BitDefender 2011 so that it allows traffic on port 1935 for all browsers on my Windows 7 machine (Firefox, IE8, Safari and Chrome). Currently I am receiving an error when accessing a web-site that uses the rtmp protocol to stream video on port 1935. The error goes away if I disable the BitDefender firewall. I would like the firewall to remain enabled while allow traffic on port 1935. How do I do this?

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