Blackberry 7290 midi help

I've looked everywhere trying to figure this out but still have no idea. I'm trying to open a midi file on my blackberry so I can add it as a ringtone. I e-mailed it to myself but when I open the e-mail there's no option to open the attachment or save it. Does anyone know how to make this work? Any help is appreciated.

cheers

Morrison

are you sure you can add a midi file to that version of BB?