Android error (Activity class does not exist)

the compiler says that my Activity class does not exist when its clearly in  the tree
i followed the tutorial to the tee but i have this build error
I have attached a screen shot to illustrate the problem
also notice the class it says doesn't exist isn't even marked in red as a syntax error
help me out here!!!
there are three screen shots here you just cant see two but if you click the screen you can see all three
also I attached them so you can see all three screen shots if you have trouble with the missing screen shots



Message was edited by: Jason Thomas