Motorola E815 / E816 Hollywood

Hi! I've just downloaded a ringtone and saved it to my sound files, but after hitting the menu there is no option to "apply as ringtone" as I do with all the rest of the sounds. THEY are MID files, but the one I downloaded is a QCP file. The phone still plays it perfectly fine so shouldn't I be able to make it a ringtone?? Do I have to convert it to an mp3? How do I do that? Thanks...