Sketchup imports missing from Layout pages leaving yellow yield sign w/exclamation point

So my model is set up with each layer ( floor plan ) as a group. I have the foundation plan on and I insert it into a Layout page. Now I go back to Sketchup and turn off foundation and turn on first floor. Do I then save so the change will register when I go back to Layout and insert into the next page? Sorry for my density.

DAVID LAWRENCE BROWN, AIA, NCARB
ARCHITECT ā€¢ DESIGNER ā€¢ BUILDER
WWW.BROWNBUILT.NET
BROWNBUILT@YAHOO.COM

It would be a whole lot easier to just show you the workflow.

Ok. Iā€™m all yours

DAVID LAWRENCE BROWN, AIA, NCARB
ARCHITECT ā€¢ DESIGNER ā€¢ BUILDER
WWW.BROWNBUILT.NET
BROWNBUILT@YAHOO.COM

I sent an e-mail to you.