Compact WP Audio Player doesn't work with Explorer

The audio player works fine with Chrome, FireFox and Safari. But does not work with Explorer. I am using Explorer 9.

Here is a example link:

http://www.mywaylanguagesoftware.com/learn-english-getting-started-free/

Any suggestions on how to fix this with Explorer, I also checked other sites using “Compact WP Audio Player” and get the same results.

https://ww.wp.xz.cn/plugins/compact-wp-audio-player/