LG Shine and mp4 problem?

I bought an LG shine recently and downloaded a song from itunes but because of the DRM and the fact that the LG shine can't support mp4 but I can't listen to it. I don't want to buy a converter and I tried to see if I could download a driver to enable mp4 but I couldn't find any. Please, how can I get my phone to play mp4 files?