Linking Objects - Issue With Multiple Proxies/Poses

I have a question…

I’ve created a rigged character, and then in a new scene linked to this character (mesh+armature as a group) and then added a proxy for the armature. I can pose it and wotnot, and everything is fine so far. If I then add another (vie add–>group–>(linked group),and add a proxy for that one via the same method, then the second proxy armature does nothing and instead the first proxy controls both meshes.

Does anyone know how to deal with this? I’ve googled around but a lot of the documentation is a bit dense on this issue, and nothing I could find answered it specifically. I just wanted to see if there was a simple answer.

Cheers everyone.
Ben