First of all, you don't have your model of your phone listed. Can you give us more info? What model phone do you have?
Have you checked the online manuals to see what types of audio files are able to be played on your Curve?
I used to play qcp files on a winmo phone. I have no idea if they are accessible on a Blackberry. More than likely they would have to be converted.
Please give more information so we can help you further.