I don't know why but i can bake all these fancy things and they turn out great but every time i make cookies they don't cook well, they either burn o the bottom or don't cook right ... I don't know what i am doing wrong there
Are you overcooking them maybe? Cookies will still cook a little once you take them out of the oven, so if they feel soft (sometimes too soft at first) when you first take them out of the oven, they will usually harden up as they're cooling.

trillian - thanks for that I might give that one a go on the weekend.