Update  : There are files in wallet-unenc-backup and rolling-backup folders  , wallet had two receiving addresses , to one manage to reopen from backup file , but it's only 1 BTC address , i still get same message if i try to open latter backup. So recovered 1.5BTC . Whats going on with this crazy wallet?

I have tried , well i never had a such problem , but i had this wallet created and open with btc ready to transfer for 5h , and then i created new wallet to save it to ,and it just switch off only wallet that with btc ... I guess some problems with multibit .