Cannot create file (files/Latest_content.csv) error message

Hi, I downloaded and installed Export views results as CVS or XML from http://drupal.org/node/93868 and installed the import/export.api as requested.

When I go to my "Latest_content" views to export the file, when I click on "CSV file link" to dowload the CVS, I'm returned the message "Cannot create file (files/Latest_content.csv)" .

And when I go in watchdog I see: "fclose(): supplied argument is not a valid stream resource in /xsite/www/backup/drupal/modules/aacontrib/views_bonus.module on line 320."

Any clue on how I can solve this problem ?

Thanks,
Brakkar