Computer can't see my sansa by anyway i tried

I have a sansa fuze 2GB. 2 days ago, i have fomat it, then my computer can’t recognize it. I seached and tried all way on 4rum to fix it but have no result. What can’t i do now?

Please help me! it’s my very important thing.

Thank you! 

Have you tried consulting the SanDisk Knowledge Base?

I tried it! But when I connected sansa, Its screen did not show up “connected” or “writing”. Just show Home’s screen, even it can’t recognize the memory card

switch to MSC mode