[kindleren]

Please pay attention to my problem，it has bothered me for several days.

I use the CLI "ebook-convert a.html a.mobi --level1-toc //h:title" to convert html file to mobi file,but when I click on the middle button of the navigation key on my kindle,there is no table of contents on my kindle screen,I just can find the table of contents in the end of the mobi file.
The table of contents shoud appear on my kindle screen when I click on the middle button of the navigation key,but it does't work.

I find a button on the interface of calibre software, which can grab news from web.This button named "fatch news".I copy the file grabed by this button to my kindle,now there is the table of contents appear on my kindle screen when I click on the middle button of the navigtion key.
So,this button's function can solve my problem.
But how to use this button's function by CLI?
Who can throw some light on it?
Thanks in advance !