Can't see any shapes in publish wizard

Hello everyone,

I'm trying to web publish a model, but I can't because in the wizard it didn't show me any shape.

I tried to create a new diagram, put a simple start-task-finish diagram but it doesn't show anything.

I created a new model, imported all the diagrams from the previous one and everything worked fine.

It seems that that particular model can't see any shapes in his diagrams.