Automatic update failed

i’m traing install automatic update but i get error

Update error: Error while creating/copying file to <code>/home/sploja/public_html/spstat/plugins/LanguagesManager/Test/Integration/ModelTest.php</code>. <br />Please check that the web server has enough permission to write to these files/directories:<br />For example, on a GNU/Linux server if your Apache httpd user is sploja, you can try to execute:<br /> <code>chown -R sploja:sploja /home/sploja/public_html/spstat</code><br /><code>chmod -R 0755 /home/sploja/public_html/spstat</code><br />

and after i cant get my piwik work
this is my site: sao paulo loja - acessorios e pecas de celular