No waveform or beat points?

Hi guys,

I have the latest version of Rekordbox (3.0.1) and some of my tracks, when I analyse, it loads a waveform overview when scanning (at the top), then it disappears and doesn't set any beat points, and sets BPM as 0.00. I have attached a file to show you what I mean. Any ideas as to why this might be?

Thanks,