Can't Select Anything on Active Layers...

Hello,

 

I am a new user of Draftsight with little CAD experience.  We have always used Autosketch to modify DWG drawings for submittal packages, but that is becoming increasingly more difficult.  

So I am modifying a DWG drawing and at some point I must have done something to make it impossible to select anything in the active layer, or any layer except layer 0.  It seems somehow related to the model.

If I select any layer as the active layer, when I try to select something on the drawing, the active layer reverts back to layer 0.

I'm not sure if this is enough detail, but any help would be tremendously appreciated.

Thanks!