redrawing the lines worked perfectly, thanks!

attached skp file (v6)

basement.skp

Hi All, I'm brand new to Sketchup - I just started using it today. I've got some tutorials up and they've been helping, but I hit a snag that I can't find the answer to online.

I'm working on layout the basement of my new house and i have all of the dimensions correct, but I can't push/pull the outside wall. Actually, I can't even select the outside wall as an interactive area. I believe it's got something to do with how I made it. I've got 2 sets of thick lines as the outside walls. They're the foundation walls so I liked that they were thicker than the rest, but I can't move them.

I can't figure out what I did wrong, or what to do to fix it. I've attached a screenshot.
Any help would be greatly appreciated!

Thanks!