Camk try extending your time soaking the match box roughs up and softens the seed shell ,
I believe that seed shells get harder as they age, so if you try to sprout them the could take up to a week to pop
I have a bag of seeds from rag weed but thats what I started with and it took forever for the seeds to pop
I use the paper towel method, I use a plastic can cover put the 4 or 6 paper towels on it, soak ,then hold sideways to let excess run off , Then I slide it on top of my cable box( there is about 3/4 of an inch space between the box and the shelf over it , I check them 3 or 4 times a day to make sure they dont dry out.
If they need water I bring the whole thing to the sink and hold under faucet for about 1 second , about 1/2 a shot glass of water then put them back on the cable box
I have had seeds that I purchased take awhile , I would give it a week before I started to worry, especially with bag seed, just make sure the paper towel stays moist not dripping wet and they will pop
This grow I started some old seed I have from a mistake ( Had a Male plant didn't catch it in time lol). anyways one of the strains I really like so I keep growing it and some of those seeds took a week to pop
This next statement caused quite a stir on the forum but Jorge Cervantes says in his book that you can influence the sex of a plant by introducing outside condition, one time I followed his directions and I got 7 out of 10 females my friend did 10 and only got 2 females with out doing anything so I know it works
Hope this helps good luck