Can't place modules in user2, user3, user4

I'm using mobility template and I need to place module below menu in main area but when I try to put module in one of these positions ( user2, user3, user4 ) module doesn't appear at all.

Any solutions ?

Maybe module is there but is covered with another module (absolute positioning).See if there is some other modules in that positions assigned to same pages.
BTW just in case I ask - have you assigned module to page(s) where you want that module to appear ?

No, no other modules in the same position.
Regarding module being assigned to the right page, I’m sure it is assigned right, because module appears on bottom or top positions.
I need module to appear instead article in main area , which position it should be ?
I tried all positions none of it placed module in main area.
Thanks

docs.joomla.org/How_do_you_put_a_module_inside_an_article%3F

I set module position to inset and it worked.