Offset curve not working for me

Dear all,

This is the first time I use Rhino so I am a complete novice. I’m trying to follow a tutorial on how to make a shoe sole, and I’m stuck at craeting two offset curves (inside and outside).

When I do the actual curve (see settings in first screenshot) it seems like nothing happens, but when I look closer I can see that it makes just a very small part of my object (see second screenshot - the small yellow selection)

I’m probably doing something very simple wrong, but unfortunately the tutorial I’m following doesn’t really address the issue. I’m trying to do exactly as he does, but it seems he’s on a different version and also on a completely different level.

Thank you in advance.

Can you post a file with the curve?

Do you check your curve over strange loop curve parts? Sometime you only see it heavy zoom.