I've never seen that software before - nice idea!
I looked in the Ubuntu bug tracker, and it looks like it's a known problem (it would seem like a pretty fundamental one too, given the purpose of the program!):
https://bugs.launchpad.net/ubuntu/+s...on/+bug/113366
There has been another release from the authors which is one minor version up from the one in the Ubuntu repositories - you should probably give that a try if it doesn't require a bunch of deps you don't have.