I use AVG 2011 Internet Security software (previously AVG 2010)

I am having issues with the AVG firewall turned "ON" when the TV is hardwired to my Thomson Gateway TG782T router which was provided by Bigpond in October 2010.
-- The TV can not access the Mezzmo media server (not displayed) - tried rebooting computer and turn TV off & on.
-- I have hardwired the TV to the router to eliminate the stuttering of several movies which has worked except for one movie "300.avi"

When I turn the AVG firewall "OFF", the TV can access the Mezzmo media server.

I have not changed any settings in AVG or the TG782T router.

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When the TV is connected by wireless, I have no issues with the TV accessing Mezzmo with the AVG firewall turned "ON"
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Are there any readers experiencing the same problem with AVG Internet Security????
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Mezzmo is a fantastic product.