how do I connect my midi keyboard to my mbox?

[imperial]

Hi Iam a new mbox user and I cant figure out how I can connect my midi keyboard to my mbox.
also when I connect it via my computer using a usb plug, it tells me the was an error downloading the software needed to run my 1x1 m-audio midisport.
please help.

and one more thing how do I get sounds coming from reason or i tunes to play on my monitors which are hooked up to the mbox? I downloaded the digidesign core audio drive as recommended by my manuel but still nothing happens, all the sounds from I tunes and reason are played by my built in speakers on my computer.

I would appreciate any help,