meshing with Salome for OpenFOAM

Hi all,
I'm a newbie in using CAELinux software.
I was interested to follow tutorials showed here in part 4.

I followed the first two tutorials but importing a step model, not creating that showed in tutorial.
It is all ok but after meshed, I can't create group!

It doesn't recognize faces or anything else. I don't understand how to solve.

How could I solve? How could I do the same simulation but using a model of mine?

Let me know! Thank you so much!!

Hello, i m newbie too and i try to work with this tutorial:

It s ok to create groups : inlet, outlet, wall...

Good luck.