dwarf hissers won't reproduce

[SkyeSpider]

I have a pair of dwarf hissers (Elliptorhina chopardi). I've had them together for about two months, now. They are without a doubt and male and female.

Still, they have not reproduced at all! I keep them in the same conditions as my standard hissers who are reproducing just fine.

What can I do differently? Has anyone else had any luck breeding these?

 

[Acro]

Are you sure your dwarf hissers are mature?
I cant really think of anything I have done (different from normal hissers) that makes them breed.
What are you feeding, temp, substrate, humidity, ect.?