What's up with my Flight Aware

I hope someone can help me. I have 5 alerts set up, none of them are working. I have alerts set up for 747’s, AN-124’s and a couple of select tail numbers in and out of IAH. I am not getting any alerts at all. I have the alerts set up for on the flight and indefinite as far as the dates. Now I know I wont be getting any alerts, because a couple of the aircraft rarely come to IAH, but we have 747’s coming everyday. Is there something I am doing wrong. Any help would be appreciated.