Plugin mp3 Ajax error

Hi all,

I've installed the "Plugin mp3" extension, but when clicking on "Add an mp3" in the News interface, I get the following JS errors:
Error: a.client is undefined
Source File: http://www.domain.com/typolight/typolight.js
Line: 21

Error: Ajax is not defined
Source File: http://www.domain.com/typolight/typolight.js
Line: 14

This is on 2.7.2. Do I need to install the Ajax-Tools extension as well? It isn't mentioned on the Plugin mp3 page.

Thanks!

Well apparently the problem was more general - I didn't notice until I was working with the Events module that the Ajax for the whole system was broken. Don't know how that happened, but after upgrading to 2.7.3, all is well.