Main topics bars and collapse icons disappears

[محروم.كوم]

Hi all!

I know it is very simple and dumb question, but I can't figure out what happens.

I have set up new installation of vBulletin and start to fill it by topics and subtopics. So I have a structure:


Topic1
-- subtopic1
-- subtopic2
Topic2
-- subtopic1
-- subtopic2
-- subtopic3

Also I have try some different styles. I haven't figured out when and how but a nice dark blue ribbons with collapse buttons on right have been disappeared. I can't find the option in admin to switch them to on.

Help please to solve the problem. Thanks! __DEFINE_LIKE_SHARE__