problem with menu

Good afternoon,
drop-down menu does not work right - when you go to the section "About company" (second one), you can't see the other two sections, which is in the section "About company". Tell me, please, how to solve this problem?

Hello,
Please submit your site url then i can see and check it.

Regards

nnbnbthis is:
www.wintertag.ru/

Hello,

You should turn off "JQuery" in component com_faqbook
Regards

thank you so much!!!