Are those bagseeds or did you go out and buy seeds?
If they are bagseeds, go ahead and grow them for another couple weeks watering lightly but normally, not misting, and see if they turn yellow. That will tell you if your soil is no good.
If they are bought seeds, you can probably scoop them out and re-pot each one individually in a party cup with some holes punched in it, and good seedling soil. Take a good sized scoop of dirt out deep and around the seedling so you don't damage the roots.
Before you do anything else, familiarize yourself with the needs of the plant at each life stage.