AUTOBLOGS - Can't import a feed


I tried to set up the autoblog plugin but with the first feed I want to import, I get stuck because of the feed isn't validate.
I tried to enable some plugins of the autoblog plugin to skip this king of error but nothing.

The feed I try to import comes from another Wordpress.

All the plugins are up to date, the Wordpress core too.

I don't want to use another plugin than yours! But this has to be able to import a large number of feeds (this is the website of a large numbers of associations).

Thank you for your help.

Have a nice day !