maybe the crux is in ther germination method,,,,
but first look at the seeds, do they look ripe ( nice color and shiny scale)
are they dense, or break if you press softly
took at she shell it should be anice solid shiny shell ... if its scaly not good
step2... let them soak for 18-24 hours in lukewarm water on a warm place
step2---- let them germinate where it is dark and humid,,, but not wet
I take clean new Kitchensponges and let them soak in warm water... then I lay the seed inbetween
So its humid , but not drowing wet and dark
Warm place for 3-5 Days......
you should see after 2 days that the seed is opening and a root shows up
Then plant them into a well pürepared soil around 1cm deep , with the root in direction bottom cover it alittle and water very gently...
Give the seeds an " open dome" to keep humidity high
( i take old plasticbottles, cut them in halves, and poke some holes in it
And no look for them twice aday
they should show up after 2-3 days
Dont get it to wet or to dry for them , always look for good drainage of your growmedium
Automatic seeds plant after germinate in final pot
Keep on growing