how can i fix my cellphone micro sd card 2gb?

i have a 2gb kingston micro sd card everything was working well until, one day it wouldnt show up on my phone, i restarted the phone and still no luck, i even tried it in other peoples phone but nothing. you cant even access it through the computer...it says plse insert external memory for more use or something like that. i want to save my photos!! ....
plse