You must upload the file of echo on myht.I'll　explain you how to introduce Echo.

first,Get Echo.Have you done this?
second,Upload the file in "extension" file.
third,Add a sentence「wfLoadExtension( 'Echo' );」in "Localsettings.php".After that,you have to run the script.When you access[https://(Set your domain here)/xxupdate.php],you can Introduce echo.