What is happening most likely is the clones are not proucing enough roots. With CFLs it is always hard to judge enough or not enough light. The nice thing about flouresant bulbs is you can always put them very close since they put off alot of heat. I would make sure the CFLs are very close without touching. And i would flush your soil or growing medium with PH neutral water for a couple minutes to make sure there is no nutrient lock. Then after give them a stress reliever (high in nitrogen) nutrient.