I requested this once before and I will request it once again - please include the name of the game in your subject heading when you post. I have now added the name of the game to your subject heading, but most people reading your post would not have had the slightest idea what game you are talking about and thus would not be able to give you any advice.
Being as this game is somewhat nonlinear and I don't know what you have done/not done within the game, my only suggestion is to take a look at the walkthrough
here and see if that helps you.