Mirrored Assemblies in Configurations - Can they be Flexible?

I have made a mirrored configuration of a complete assembly that has moving components. In other words, I have left and right hand configurations, which when activated suppress each other.

The original assembly is fine, all required components move. However, in the mirrored configuration, they do not, they are rigid. Am I missing something, or is it not possible have moving components in mirrored configurations within the same model?

Thanks in advance.

SolidworksAssemblies