Cant create a vaadin project while offline on ubuntu using eclipse plugin

I just changed my OS from windows to ubuntu and I’m having issues to create a project while offline using vaadin eclipse. Even if i’ve downloaded all jars with ivy on the first run when i try to create a new project it just can’t find the pre-downloaded ivy files, so, every time i must download with ivy new files again. I’m currently using ubuntu 13.04 64bit but, i tryied also and versions 12.04 and 12.10 both 64bit. I’ve opened a
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