I merged it to here, but as i see the 2 posts are barely the same. Nvm
Ontopic: Please copy paste here your gproxy log, so we can see what is the reason of your drop.
If you download the installer v5 from the link efko gave you, it should update itself to latest version on first start so versions should not be a problem. Game patch must be 1.26a make sure you have it, not the simple 1.26 (in case there is 1.26 at all). You can also download the 1.26a patch from the link efko provided.
If versions are ok, and game disconnects you after login, it will most likely be some ban problem.
If you can't make it working, copy paste your gproxy log for us in order to help you.