CKEditor integration with Wiris PHP plugin: open_basedir restriction

As per Wiris guide.

1. Give execution rights to the web server user on the PHP files contained at to ckeditor/plugins/ckeditor_wiris/integration.
   → My settings: Folder "integration": 755. All files inside this folder: 754
2. Give write permissions to ckeditor/plugins/ckeditor_wiris/cache and to ckeditor/plugins/ckeditor_wiris/formulas directories to the web server user. Those folders will be used to store formula MathML codes and temporal images.
   → My settings for these folder: 775

However, I get following warnings while trying to open Wiris "Math Popup", and doesn't open properly.

Warning: is_file(): open_basedir restriction in effect. File(/home/my_user_name/public_html/ckeditor/plugins/ckeditor_wiris/integration/../../../../../../../../lib/moodlelib.php) is not within the allowed path(s): (/home/my_user_name:/usr/lib/php:/tmp) in /home/my_user_name/public_html/ckeditor/plugins/ckeditor_wiris/integration/bootstrap.php on line 39

Warning: is_file(): open_basedir restriction in effect. File(/home/my_user_name/public_html/ckeditor/plugins/ckeditor_wiris/integration/../../../../../../lib/moodlelib.php) is not within the allowed path(s): (/home/my_user_name:/usr/lib/php:/tmp) in /home/my_user_name/public_html/ckeditor/plugins/ckeditor_wiris/integration/bootstrap.php on line 39

Are my permissions correct? Do these warnings relate to file/folder permissions? I am using www.serversfree.com webhosting to test this out.

It looks like there's an issue in your installation. Please check the plugin test page: <url>/ckeditor/plugins/ckeditor_wiris/integration/test.php. There shouldn't be any errors there. Please review the installation instructions at http://www.wiris.com/plugins/docs/ckeditor.