Hey there,
I'm no expert, but I know what the experts are going to say... More details please.
How are you germinating?
Are you sure the soil is ok?
Are the seeds viable?

Pictures say a thousand words

Maybe try another method, ie if you're using paper towels, don't. Pop the seeds in good quality moist soil, watered with clean water, and then make some kind of humidity dome (I used a a cup with cling-wrap over top), and give them 18/6 light. And be patient

Goodluck sir!