Thats a bit odd
I originally signed up for the trial and they forwarded me to a link. Although i did have some issues at first.
Make sure you only click the patcher once and wait for it to load. Also make sure you have enough free space. It can also take a while to initialize the patcher.
Are you using US version, or EU version. I was using US version
You can try a bit torrent version, and also check the warhammeronline.com forums for some answers to troubleshooting.
The trial is about 4 gig i think, my d/l took about 2 days. IF you do choose to buy the game, you need to d.l another 2 gig after that. The game is good, im lvl 39 Squig herder (40 lvl max). The pvp is pretty hectic end game, you ave to storm keeps etc and win zones....def a good change from wow.
I recommend playing on an oceanic server, the latency seems alot faster..I play on ironclaw ( my char name is "ziing")