Seeking not working

When I use peaks.js on a local machine, I am not able to seek the audio using the visualizer. I can move the playhead, but once I play press again, it moves back to wherever the audio was playing before (you can test it [here](http://mtechdoc7.smusic.nyu.edu:8888/SegmentAnnotator/demo_page.html)). It only works if I seek using the slider from the HTML audio tag.

However, this seems to work fine when I try peaks.js on the [official page](http://waveform.prototyping.bbc.co.uk/). 

I am running a Chrome 32.0.1700.107 on OS X 10.9.1. Do you know what could be the problem?

Thanks a lot!