Why does my 8 months old son scream ?? what do I need to do I feel as thought Im failing as a parent?

Ummm....he screams because he is only 8 months old. Did you mean 18 months?? Well, I'm going with you saying he's 8 months old. What the hell is a time-out to an 8 month old? My daughter is 9 months old and she doesn't even grasp the concept of "no" let alone a time out. You can't teach him manners right now. He doesn't even know how to talk. I don't know what you're doing exactly and what you're trying to accomplish, but you're going about it all wrong. He's learning that he has a voice and is using it. Leave the kid alone!