I connected N900 to PC with USB Cable and choose Masstorage.
<some minutes later>
The PC got an error from a website and suddenly Shutdown.
I discharge my N900 and try to open the Main Phone Memory (32GB) with File Manager, but it can't open it.
I Restart N900 and try again, but now... when i click on Menu button, its not appear.
I plug it to PC again... The PC can't open it too. The phone isn't appear Masstorage and PC Suit buttons.

Can anyone tell me how to fix it?