Instalation error "GET request to piwik.php failed"


I’m trying to install piwik to one of my WPS, but i get such error:

GET request to piwik.php failed. Try whitelisting this URL from HTTP Authentication and disable mod_security (you may have to ask your webhost). For more information about the error, check your web server error log file.
After making this change, restart your web server.

But i do not use mod_security.

Please advise.

No ieads ? :frowning: