Thanks Buzzard01.
I’m not a expert on Windows 2008 R2 server. I try to set all the permission “Full control” to IIS_IUSRS and modify the .htaccess of the directory c:\inetpub\wwwroot\wp-content\backups with “allow from all” …I also set the permission “Full control” for the file “wp-cron.php” but i always have the same error… Do you have more precisions about the configurations of permissions Buzzard01 ?
Could there be a problem with / and \ on Windows env ? I set this on the wp-config.php : define(‘HMBKP’, ‘c:\inetpub\wwwroot\wp-content\backups’); but i see this on the back-office c:/inetpub/wwwroot/wp-content/backups
Thanks,