They could have banned hotspot, thats what happened in my case. If you have a dynamic ip you should be able to get in fine without the proxy. It can detect it easy and don't go in with a name like Player8 or something. Just go to user.ini, then delete all of nexgen, rename your computer, and don't use proxy, or hotspot. Worked pretty awesome for me and I'm staying in the server now without any problems.
I'm thinking I know what server your talking about

but I dont know just a guess lol