Hi,
Well, first you need to create/configure the module you want to display under the product page and then, in the HikaMarket configuration screen you need to click on the "select" button and then choose the module(s) you want to display under the product page.
After that you have to click on "OK" and then, click on "save".
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.