SanDisk MicroSD card write protected.

Hello,

Sir,
I was using the memory card of SanDisk 2 GB SD for my Nokia phone. Now its not able to see the photos in it., and I tried to format the card by connecting with computer using adapter, but it says that card is write protected.,
What should I do to overcome this problem.??
Kindly help me to get the photos back....please.........

thank you....