Please check your Moodle version and download the proper plug-in.
for Moodle 3.0+ for Moodle 2.9 for Moodle 2.7+ for Moodle 2.6 for Moodle 2.0 - 2.5 for Moodle 1.7 - 1.9
Check out the Electa Live Moodle Activity Module installation guide on how to install and configure the Moodle plug-in.