Problem with the bones in Blender 2.5.4

I'm using the latest nightly build and Blender 2.5.4, Windows Vista86x. When importing the .mhx to Blender it appeers normal. Look:

Clik to full view.
But when I select one bone in pose mode and try start no "pose" the mesh it doesn't move it!
There is anything to do with the import options? Look:

Sorry 'bout my english I'm brazilian >.<, Help me, pretty please!?

Clik to full view.
But when I select one bone in pose mode and try start no "pose" the mesh it doesn't move it!

There is anything to do with the import options? Look:

Sorry 'bout my english I'm brazilian >.<, Help me, pretty please!?