I 'm trying to play writable in my car but so far I've had no luck. HELP PLEASE!!!?

hmmm, make sure the disc is finalized. don't use generic media, like maxell or dynex, use sony (the ink/dye they use is much better) or TDK discs. The name brand does matter, i've burned a lot of cd's and dvd's trust me. HP seems to be ok too. only had a few bad burns outta a hundred stack. Oh, and an obvious one lol, Probably won't be able to play MP# cd's, only regular 18 an under or up tracks :P