Problem with widgets (Weta)

Hello everyone !

Okay so I’m here cause I have a problem with my widgets. When I want to add some on my blog that doesn’t work. I go to “Appearances” -> “Widgets”, and then add as example the slider it doesn’t appear . But it doesn’t work only on some parts of the blog like the Front page content 1 and 2, the side bar, etc it only works on the footers. So I can add/change the widgets only in the footers area. I don’t understand why…hope you’ll help me…I have the latest version of the theme, and all (except this) works perfectly!

Thank you!