The full function of all of the components in Premiere Elements will not be available until you actually purchase and register the program and then open a new project using that video's setting.
You don't say what camcorder is your source for your video, but that could well be the case in your situation.
Thanks for the reply.
It's a Sony Handycam DCR-SR32 and the files are mpg.
If I actually open up the clip in a project then it plays the audio with no issue. It's only when playing the video in the Organiser that I see the issue.
If you open a new project in your fully-registered version of Premiere Elements and set it up for Hard Disk Camcorder video (standard definition) the components will register and you will be able to work with this type of video in both Premiere Elements and the Organizer. (The trial version of Premiere Elements is, despite what you may have heard, not even remotely fully functional.)
Also, per the program's requirements, ensure that you have the latest version of Quicktime.