my VX8550 can't detect mp3 files in my SD card

Hi guys, this may be a stupid question, but this is literally not discussed in the user manual for my phone anywhere...

I have a 2 gig micro SD card full of mp3's, and my phone can't see them. how do I access these? Thanks.

was the card formatted in the phone? they have to go in a specific folder.

Thanks John. No, I didn't format it in the phone, I don't see how to do that in my manual either. Do you know how to do it?

Thanks much

Rick

**It asks for a four digit unlock code, when I try to format it, but I never set a code...can anyone assist?**

***I figured it out, it was the last four digits of my phone number***