nice model! the reason is that your armature isn't the parent of the model. my exporter requires that. it's explained in the rigging & constraints section of my tutorial.

to fix it do the following:

- select your model
- then additionally select the armature
- press [ctrl-p] and choose "armature" and "don't make groups"
- in your model's modifier tab remove the armature modifier and click "make real" on the armature parent deform

there also seem to be some weight painting issues on the hands but they should be easy to fix.