My card write protected??

Ok, so I have a SD mini 512mb card for my phone. It worked when I got it. But now when ever I try to put anything on it or delete anything from it. I get a message that say "Media is write protected-please remove write-protection or use another disk". My question is, how do I fix this?

There may be a write protect tab on the SD adaptor. Otherwise, there is no wrote protection on the MicroSD card itself.

Alright thanks. I figured it out. Something was wrong with my dock for the card and it would read it as a write protected card. I just got a new dock and now it works fine.