"No questions found" after questions creation ?

Hello,

(... on a new wordpress installation)

a/ I install the Q&A plugin.
b/ I activate the plugin
c/ I give view/edit questions/answers to everybody
d/ I create 3 questions (using /questions/ask/ url as says doc)
e/ But I don't see any question when I check "/questions/ " or "questions/unanswered/" pages. Message is : "No questions found".

What should I do ?

Thanks,
Fabien