Sandisk - Cruzer Blade - 8 GB (Showing ERROR)

Hello

I had purchased a Sandisk Cruzer Balde (8GB) pendivie in Jan’11. Yesterday I was deleting some from the pen drive and suddenly I noticed tha the containt page went blank and it showed blank page. 

Now I checek the said drive in different computer’s but it is showing Zero bites. It is not allowing to format also. I tried to read the data with dos also but with no help.

Request you to guide me the next course of action.

sounds like a hardware failure. contact sandisk support.

http://kb.sandisk.com/

I HAVE PURCHASED SANDISK CRUISER BLADE 8 GB.  IT IS SHOWING ERROR/BLANK AND SHOWING SOME FILES IN SOME SYSTEM.  I FEEL THERE IS A PROBLEM.  PLEASE GUIDE ME.