Order problem I am facing when I am trying to order an Alienware m17x

Should I upgrade more on processor, video card, and other stuff on laptop? is it a waste of money and does not need it at all? (its pretty expensive for a high school student)

Everything went really well until..

when i was going to order, it says(?) that there a problem on compatibility when i unclicked the alienware mouse part; cause i dont need it at all. (I already have an awesome mouse to play games.)

So i have to waste extra 100 dollars on the mouse and does not know what to do.

Please help.

How do i order without a mouse? It seems like its not working. :(