We finally got the ground leveled, and the pool set up and filled with water. We went to turn on the filter, and it isn't doing anything? You can hear it running, but where the skimmer basket is, there is no suction. I turned the filter off, and unscrewed the air release valve, to release some of the air. Plugged it back in, had my AH-HA moment when it finally started working, and then it stopped again? It only started sucking for about 2 seconds and stopped. Has anyone else had this problem when first setting up their pool, or know what I might be doing wrong? Thank you in advance!