Acer Revo RL 100

Hello.. I have a acer revo rl 100, the problem I have is when I go on the 3d option when I press play its saying I need a 3d compatable tv.well I have got a 3d tv,its a lg,im just wondering if it is saying a active tv,mine is a passive tv,when I click on the 3d on the screen on the bottem it goes to 2d mode,im all confussed,I need help please,is there any help I would be greartfull
 
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