bigpasty

When I originally created the server, I had it under creative. I built some things and was able to switch it back to survival. But for some reason, there is absolutely no food decay, and there are no mobs. I have my spawn mobs setting on, and difficulty on normal, I have restarted the server several times and I'm very confused as to what's happening to my server. Has anyone had the same experience and been able to fix it?