SD Card is "Write Protected"?!

I use an SD card in my phone/PDA for storing music. I plugged it into the card reader on my computer to add some more files, and it came back saying that it couldn't be done because it was "write protected". I have never put a write protection on this card, and I couldn't find the option anywhere to unprotect it. How do I format it, or just get rid of the write protection? I don't mind formatting it, since I have all of those files elsewhere to put back in.

Did you flip the little write-protect/lock switch my mistake?

Didn't know there was one, I'll look for it though.


Found it, thanks. I never knew that was there...