I bought a SanDisk 2.0gB MicroSD card for my cell phone's music player. I can put music and documents on it and t works great... up until yesterday, when I put it into the adapter and put it into my Digital Camera, and when I go to take a picture it says SD Card is Write Protected...

I really need this camera in two days and I don't want to have to go out and buy a new one.

How do I un-write protect it?