[Support Structure not printing.]

Hi there,

I'm quite new to Cura and Ultimaker.

For a school project we have to 3D print a piece of outside furniture made of tubes.

I made my model using Sketchup and exported it to a .dae file.

This is the formate that my teacher told me to use. After failing to export the model I decided to export it as a .obj file.

I was able to get the model in to Cura this time.

As my model consists only of thin tubes, I needed a support stucture. So I ticked the add support structure box. But after starting printing, I soon found that it wasn't printing the support structure. My teacher didn't know why, as he had never tried printing a .obj file.

Does anybody know how i could make this work?

Thanks in advance!

Tom Hodgson

Ps. I'm using the Ultimaker original, Cura 14.07 and Sketchup 2013.