F-secure 2014 is restricting the internet access of a website

Dear Sir/Ms

I have F-secure 2014 for my PC , OS Windows 8 (not Windows 8.1).

I use Firefox and also Google Chrome as web browser.

F-secure 2014 is restricting the internet access of a website.

It is very very difficult to access this website: www.zzkorea.com.

If I turn off F-secure 2014, than it is easy to open and surf www.zzkorea.com.

Is there a choose bewteen internt "for high security" and "for low security" ? Or another solutions?

Thank you very much.

Best regards.