Why is this a draw and not checkmate?

Ok I was playing Chess against a computer and right when I thought I hit Checkmate, It claimed a draw. Why is this? %26gt;=(



Link to screen attached.



http://i435.photobucket.com/albums/qq72/鈥?/a>Why is this a draw and not checkmate?
The opposing king has no move to make, which would constitute a checkmate IF the king was already put in check. However, you didn't put him in check. Your two rooks and your queen were set up for the checkmate, but you have to remember to first put the king in check.
One of the disadvantages of having too much material is that you run into situations like that. Look closely at the position. Where is the opponent going to move his king on the next move? The are no legal moves! Since the king is not in check and has no legal moves, its a draw by stalemate.Why is this a draw and not checkmate?
because you dont have him in check and he has no moves he can make. In order to have him in check one of your peices should ba able to take his peice none of yours can untill he moves but he cant move into check.
this is called a "stale-mate"...a classic rookie mistakeWhy is this a draw and not checkmate?
you cant put the opposing team in checkmate until he is already in check