Problem with input of generators.

[twistedillusionz]

I am currently running a two-player Tekkit Legends world, but I have encountered a problem I can't seem to tackle.

 am using a coke oven to convert my coal into coal coke. I have handled the output of creosote oil, but the output of coal coke forms a problem. I'm using a wooden transport pipe and a redstone engine connected to cobblestone pipes. Those cobblestone pipes then are connected to the bottom of a generator, but the coal coke won't end up in the lower slot; only in the top one.

Does anyone know a solution to this?