Double XP is not working for me! HELP

I have 50+ match of double xp waiting for me and I can not use it I activated it all on dewxp.com and it has not been working for 1 week. Please help and tell me why this has happened.

Bump.

You activated the codes, but did you sign into your Xbox Live profile through the Dew XP website and Apply them to your gamertag?