"windows was unable to complete the format"?

I have a 2 GB sandisk mirco SD card and i accidentally pull it out when i was loading something onto it(yes, i know that was stupid). I've tried formatting it but it says "windows was unable to complete the format". Also, when i use a card reader, it doesnt show up. when i double click the removable drive its in, "My Computer" doesnt respond and i have to control, alt, delete. Can anyone help me?