Why does my FormEntry XSN file refuse to open in InfoPath design mode?

Hi. I have a problem. I install the formentry module in Platform 1.9 and when I download the xsn file, it refused to be openned in design mode in InfoPath. The error is the following:

Le schéma XML contient des espaces vides dans la déclaration d’espace de noms suivante : formentry.infopath_server_url cannot be empty/moduleServlet/formentry/forms/schema/2-1 InfoPath ne prend pas en charge les espaces de noms contenant des espaces vides.

So the error said that there is empty spaces in the path and Infopath didn’t take in charge space name contening empty spaces.

Someone can have an idea on what is going on?