Marketpress "Comments are closed"

I have tried to search the forum and found only single thread about this and not real instruction.

I would like to have comments on my product pages in marketplace (and to add to it Comment Plus).

The problem is currently all I have on my products pages is "Comments are closed" and if/when I activate Comments Plus i can see the switch of the comments display box...

http://nes.dev.frenkel-online.com/store/products/golden-organza-rose-and-pearls-necklace/