Sorry for my english, but i apologize - i use translator

I have a few routers on which I use Gargoyle . It often happens that I can not save option . I can not save such as QOS option in the download section . Zanaczam QOS on Set the class , I click save , move on to another section . I go back and this option is not saved , not turned on. What could be the reason , maybe there is some way to turn such a section through the terminal ? Used routers TL- WN740N , TL- WN841N , TL- WDR4300 .
http://prntscr.com/8w7mez
thx
