public function dropLinkedServerIfExists($linkedServerName)
 {
     $MSSQLHandler = new MSSQLHandler(MSSQLWLS_DB_USER, MSSQLWLS_DB_PASSWORD, MSSQLWLS_DB_NAME, MSSQLWLS_DB_HOST, MSSQLWLS_DB_PORT, null, null);
     $MSSQLHandler->dropLinkedServerIfExists($linkedServerName);
 }