ALISTAJA

I am having a problem with my bomber plane. The bomber has 3 cluster bombs and all of them lose the ability to detonate after detaching from the bomber itself. They still can be detonated when still atached to the bomber. The bombs work by having many decouplers atached to eachother. The I am rather new to this game would like some help. What do i need to do in order to detonate the bombs in the air?