Cucumbers and more

My (old, and some self-saved) crystal lemon cucumber seed is doing horribly. Nothing I've sown has sprouted at all. I've stuck all the rest in some damp kitchen roll in the propagator but no sprouts so far. Two seeds look like they are thinking about it. I only have one other salad cucumber (Diva) so I may need to get some more seed if I don't get any of the crystal lemon seed to germinate.