Path is not visible

I use espression blend 2.
If i convert rectangle into path then it is not visible in diagram.
For example:
This is the rectangle:

This is the path:

That Path works for me, in both GoWPF 1.0.1 and GoSilverlight 1.0.1:

That’s what you expected, right?

(Ignore the links, which are obviously different in my two test applications.)