Hi,
If you want to display all categories, you have to set the option "sub element filter" to "all sub elements" and not "direct sub elements".
Otherwise, you can click on the category in order to enter into. At this moment you will see the sub categories of the selecting category.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.