After Installing WP Security problem with customizing themes

Hello dear wordpress community!

I installed the better WP Security plugin and adjusted some settings. Interestingly it is not possible for me anymore to view and customize the theme in the right pane of the customization dashboard. Whatever i try to view and customize there isnt a way to see something. The only possibility for me to customize is to deactivate the wp security plugin. By doing this it is possible for me to manage and customize the themes within the dashboard normally. Is there a special adjustment that i need to undertake?

These are my settings right now:
You are enforcing strong passwords, but not for all users. Click here to fix.
Your WordPress header is showing too much information to users. Click here to fix.
Non-administrators can see all updates. Click here to fix.
The admin user has been removed.
The user with id 1 has been removed.
Your table prefix is wpxy_
You are not scheduling regular backups of your WordPress database. Click here to fix.
Your WordPress admin area is available 24/7. Do you really update 24 hours a day? Click here to fix.
You are blocking known bad hosts and agents with HackRepair.com’s blacklist..
Your login area is protected from brute force attacks.
Your WordPress admin area is not hidden. Click here to fix.
Your .htaccess file is NOT secured. Click here to fix.
Your installation is not actively blocking attackers trying to scan your site for vulnerabilities. Click here to fix.
Your installation is actively looking for changed files.
Your installation accepts long (over 255 character) URLS. This can lead to vulnerabilities. Click here to fix.
You are allowing users to edit theme and plugin files from the WordPress backend. Click here to fix.
Better WP Security is allowed to write to wp-config.php and .htaccess.
wp-config.php and .htacess are writeable. Click here to fix.
Users may still be able to get version information from various plugins and themes. Click here to fix.
You should rename the wp-content directory of your site. Click here to do so.
You are requiring a secure connection for logins or the admin area but not both. Click here to fix.

As you can see there should be pretty much security fixes activated. All of them do not have any influence on the behaviour.

I am using WordPress 3.5.1 with the latest better wp security plugin.

I hope this screenshot explains my problem:

Thank you in advance
with best regards
sath

http://wordpress.org/extend/plugins/better-wp-security/