LeoPard

Now i must restore a database from a backup file of MS SQL Sever 6.5, but this file is bad. When i restore database from this file, SQL Server tell me that the format of this file is not file format of SQL Server 6.5. So that I must repair this backup file firstly. I don't know database file format of SQL Server 6.5. I want to get some helps from experts in this forum. Thanks.