work with mysql

I have local database - Server version: 5.1.28-rc-community MySQL Community Server (GPL)

function CreateTable()

{

  var Qry = ADO.CreateADOQuery();

  

  Qry.ConnectionString = "Driver={MySQL ODBC 5.1 Driver};Server=localhost;Database=my_db;Uid=root;Pwd=root;";

  

  Qry.SQL = "CREATE TABLE "+

  "staff2 ("+

  "id MEDIUMINT NOT NULL AUTO_INCREMENT, "+

  "name CHAR(30) NOT NULL, "+

  "age SMALLINT(6) NOT NULL, "+

  "salary int(15) NOT NULL, "+

  "PRIMARY KEY(id) "+

  ");"          

            

  Qry.ExecSQL();

  

  Qry.Close();

}



on line 'Qry.ExecSQL();'

I have error message

"[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified"



help me please