DataSource Controls :: Connect Sql Server 2005 Through OBDC Connection

I try to connect sql server 2005 through OBDC connection bt i face a error, i face this error

ERROR [08001] [Microsoft][ODBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied. ERROR [01000] [Microsoft][ODBC SQL Server Driver][DBNETLIB]ConnectionOpen (Connect()).

OdbcConnection conn = new OdbcConnection("Driver={SQL Server};Server=test;UID=sa;PWD=java;");// test is my ODBC connection name
string query = "INSERT INTO test VALUES ('" + textBox1.Text + "','" + textBox2.Text + "')";
OdbcCommand cmd = new OdbcCommand(query, conn);
try
{
conn.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("Record Inserted.");
}
finally
{
conn.Close();
}