I have a 2" pvc pipe from my sump pump to my yard. However, where it is draining causes a problem because of mud and standing water. So I attempted to make a "french" drain by digging a 2'X 2' hole, exended the pvc pipe and filled it with stones. Now last night there was no rain and there was 2" of standing water on the fill dirt. So the drain was not effective. I 've got a storm drain 53' away from the discharge point. I need suggestions on how to fix this even bigger mess than when I started! Please help!