I'm following popular smoke recipes but I CANNOT get my smoke comp to ignite.

I've followed several recipes that seem to be popular, the most recent being...

12 parts kno3 8 parts sugar 10 parts wax

To save my life, I cannot get the main comp portion to take off. I've even toyed around with increasing kno3, but no luck. I fill the ignite hole with 50/50 kno3 sugar.

I feel like this is a pretty simple (appearing) process, so it's incredibly frustrating that it's not working.