Maybe your ISP has routing problems, for a test download the offline key and put in same folder as trainer and see if it starts up that way.
At the very top just follow instructions, and when getting a key make sure the file you get is more than 0 bytes inside the archive. If it is 0 bytes then there was a problem, just re-ask for the key again.
First of all make your offline file, then disconnect your internet connection, put it with the desired trainer in the same folder, run, enjoy.
The only other thing I can think of is perhaps your browser security is up way too high, as the trainers use IE browsing in parts.
What am i doing wrong or whats wrong... I didnt subscribe to 1 year subscription for this :P
[Edited by hiblahiblan, 1/3/2013 9:07:19 AM]
So something has gone wrong in the middle, as said before im sure Pwiz has checked your account and has seen no problems.
So we can only offer you options you can try to run the trainer.
One last thing to try, before windows starts press F8 and select Safe Mode with Networking. Then run the trainer then, if it authenticates, then you definitely know something is wrong with your full mode windows, perhaps a 3rd party app blocking outgoing traffic.
Also make sure if using a router than you have Port 80 open both TCP and UDP.