Error when installing ver 1.12

Hi there,

I wanted to try your script.

I have tried from Softaculous and also tried to upload the script I've downloaded from
your site.

No matter how, I get the same error:

Error: Unable to start session. Please check that the web server has enough permission to write to these files/directories:
For example, on a Linux server if your Apache httpd user is www-data, you can try to execute:
chown -R www-data:www-data /home/webhost/public_html/webstats/tmp/sessions/
chmod -R 0755 /home/webhost/public_html/webstats/tmp/sessions/

Debug: the original error was
session has already been started by session.auto-start or session_start()

All those dir are chmodded 755 and I have also tried to add to php.ini:

session.auto_start = "0"

Nothing helps.

Last time I did all the uploading, went to my install dir, but couldn't do anything
because of the error above, so no database or anything.

Please help..