I don't wanna blame the victim here, but if all of these suggestions aren't working, perhaps your specific trainer was deactivated. The offline authentication should work, and if not, downloading a new copy of the same trainer should work.
--------------------------------------------------------------------------- OMFG!!!!! TRAINER HAS BEEN UPDATED!!!! HOLY ****!!!!! NO WAY!!!!!
Check your firewall and AV status and make sure the trainer has permission to connect to the internet. Make sure the trainer is running in administrator mode.
--------------------------------------------------------------------------- Your bitterness, I will dispel