It could be due to the daylight savings time change, tournament hours here in the US have switched back to odd hours. Check the side box showing your tournament history and if the numbers like "-- pts" are white, that means you didn't participate in the recent tournament. Finally, don't think this would go in this forum, I'm pretty sure the "tournaments" in tournaments and events refers to private tournaments created by players
I'm pretty sure the DST has nothing to do with it, since here in Europe we change the time two weeks later than over at the States. And the original poster is most likely on the same timezone as UR servers.
So, either you're not playing during the right time (Your even hours, if I'm not mistaken), in the right room or you've simply turned off the Kate messages.