Reply to akai mpk mini problems

Hey guys,
I'm new here so I'll try not to be too noobish.

I've looked over the search and can't find anything that relates to my problem so here goes:

I recently got an akai mpk mini and use it with ableton. I've found that the middle E key doesn't work. Would you reckon it was some kind of programming error or hardware?

Here's a video of said problem:
http://www.youtube.com/watch?v=Wap2S4entRs

thanks in advance.