importing slt files

I downloaded an stl file from etsy I wanted to use and following this video I was able to open it.

[www.youtube.com]

It shows up as a layer now, but there is no image vector that shows up to select. What am I doing wrong?

I have tried messing with it for the past 24 hrs but its still the same problem. I can import it and set up the size and everything, but then after that its gone. I can see that it has a layer made for it but I can't see anything to set up after that.

I had a customer stop by with this issue a couple weeks ago -- and what we discovered was that his model was SO huge that it when we looked at the drawing in vcarve it looked like nothing was there. In fact we were looking at a tiny flat area of the model. We went through the import dialog again and made sure that the scale was set to a reasonable size (like the model was 4" wide, not 200" wide). I know you've already checked the size of the model, but it may be an issue like inches vs. mm

I think it was something similar. I think I was trying to make it too tall or something but after watchging a different vid I was able to get it . Thanks. for your time.