ES nao entendo rapido Qual LT pergunta ???
Basically you need to install Flash Player to play Farmville. That message is saying that if the game takes a long time to load then you might have an older version:
You can download the lastest flash player here: http://get.adobe.com/flashplayer/
I do know that a lot of people (Myself included) who have huge farms with tons of animals placed all over will take longer to load. If thats the case then you just have to wait.