Free weekend not working

According to an email I got from Xbox the other day and thevariouswebistes, there is a free liveweekend from today to sunday for all silver members. I'm a silver member and was looking forward to playing online but I went to play Fifa 11 and it said I don't have the correct permissions, I went to the family settings and they allow me to do everything. I tried again and it won't let me play online, tried all my games and none of them let me play online!!

Anyone had the same problems and how do I play online this weekend for free like Xbox promised???

Thanks

well it really wouldnt be a free weekend if it started today would it? If they are doing one it usually starts on a friday and goes through sunday.