Plugin Not processing any feeds

Hi there,

I'm trying with a number of plugins and still I can't put this feature to work. The only plugin which seems to work is feed wordpress. I followed your instructions and I configured some feeds, but nothing happens: no automatic update, no manual update, no error / debugging message. I'm always told that feeds have never been updated; if I manually launch update I am said that the update has been launched, but in the dashboard there is no data, no post is imported. Nothin at all!! What can I do?