I just bought a new house with a pool. The old kreepy krawler (I'll call KK) wasn't working because it was missing a few parts, so I went out and bought a new Shark KK. It has brand new everything going straight to the connection port in the skimmer hole. The KK came with a flow testing device for min/max flow, but for some reason the suction wont even hit the min line when connected. The suction feels strong, but i guess it's not enough? I turned on the pump (and made sure all the air was out) and noticed that the KK doesn't move. While goofing around with the sand filter, which was recently changed, I tried to backflush the system. The KK started to work!!! I dont get it? While in backflush mode, it works, but when it's in the normal position it wont. Does anyone have ANY solutions? Besides checking my KK parts? I've done that several times even tho they are new. I also made sure that the drain is closed. Please help!!!