Can't seem to effect B.B.Bunny files. Wrong version?

Hello. I downloaded and was playing around with the character blend files that are available from Big Buck Bunny.

I noticed that for the bird, no matter what I would do to the bones, nothing would happen to the actual mesh. Might I have the wrong version on this PC (2.45?)

are you in pose mode or edit mode? pose mode is correct.

I tried it on a 2.45 linux box, and the mesh didn’t react in any sensible way to moving the bones. I tried it on a 2.47 WinXP box, and it’s working normally. thanks anyway and sorry to bother.