Good morning to you all,

I am new at ringtones and stuff, and I was wondering if I can make my own ringtones for my LG TU500?
I tried using a short mp3 (about 200k), I uploaded it on my phone (like with any mp3 song) and tried using it as a ringtone, but it keeps saying "format inacceptable", or something like that.

Is there something I do wrong, or something I don't know?

Thanks so much!!!