Can't repair MyISAM table

[inoy cavalera]

Hi Experts,


I have a mysql database which is used to stored a measurement data. For unknown reason the database is crashed (#145 - Table '.\runout\ro_data' is marked as crashed and should be repaired) and i'm unable to repair it.
When i run CHECK TABLE query there are 4 results...

Table Op Msg_type Msg_text
runout.ro_data check warning Table is marked as crashed
runout.ro_data check warning 12 clients are using or haven't closed the table p...
runout.ro_data check error Size of datafile is: 0 Should be: 11497635...
runout.ro_data check error Corrupt

and everytime i run REPAIR TABLE query, my table become accessible but no data appear, i lost all the data.

My MYI file is about 4.9 GB and the MYD file is 0 KB.
How can i repair my table without loosing any data?

Thank you...