I've problem I can't start games on Yahoo messenger.....

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I'm trying to start a game on yahoo messenger with my contacts, but when I start the game and the other contact accepted a blank page appear to me and there is no loading. What to do? Anybody knows how to fix this problem? I'm sure that my java component is working and I checked the internet explorer option to assure it is allowed. I don't know what to do? How to fix it? Have anybody Idea about it?