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Also, Access databases aren't designed for heavy web work. They are good for desktop/intranet applications, but won't hold up under the internet stress.
Look to something like mySQL, postGreSql, or the big boys MSSQL, etc.
For any work of any volume forget access use mysql or Microsoft SQLServer ( *nix platform or Microsoft server platform respectively )
Best have the database away from the root directory - as previously stated.
255 connections is the theoretical maximum but under load try 5 as a max!