Pendrive( Kingston Data Traveller 8 GB) not opening

I have a 8 GB Kingston Data traveller Pen drive. It has suddenly stopeed opening. Whenever I attach it to the PC, it is shown in the my computer list. But when I try to open I get a error window: The drive is not formatted, do you want to format it now?" probably this is due to virus problem . Is there anybody to help me. Thanks.

Hi , it is a new pen drive , have you tried it in some other computer ?

No , I have to try that. The same was in use for along time and never behaved like this.

Have you tried in other computer yet, is it not working on it too ?