DLNA protocol error 2104 on PS3

Hello, I can not launched my videos / music from my computer on the ps3,, when I want to play a video it makes me an error "DLNA Protocol error 2104 .
My PC runs on XP and Media Player version 11.0.5721.5230 and BitDefender anti-virus 2009

I can not find solutions.

Thank you in advance for your help!

I did not look after the explanation of the error number but try to configure your firewall or simply try disabling your firewall for testing.

I found the solution.

It should be configured in your firewall the PS3 in Zone of Confidence.

Procedure for Bitdefender 2009:
Advanced setting
Firewall tab
Then window Zone
Added
Browse network
Browse
You click on the IP address for the PS3
Subtype you choose Confidence

Then your PS3 is under management of trust

Then under the tab the same firewall you go forward on the window and you remove the checkmark from stealth mode

You close and it works

Hi, thank you for your answer!
Disconnecting my firewall in BitDefender 2008, the PS3 system dialogue without worries and my photos open without error.
However, once the firewall is activated, the fault appears.