How do I copy deformers? What am I doing wrong?

There's a store that has recently shut down with some great, cheap deformers, so now that I don't have access to them I'd like to copy them from one of my accounts to another.

I've downloaded [account A]'s deformer, while using [account B], in the form of an xml and tried using mesh helper to turn it into a dae, which it did. I then uploaded the dae and set the levels of details to 0's, but when I wear the object... nothing happens.

I'm not sure what I'm doing wrong.