...But I can create a new character with the same faction on the same server? It was working up until the servers shut down to update to GU13, after they went back up, I couldn't login. At first I put it down to overloading, but since I can login with a different character this can't be the case. I did lodge a support ticket, but it appears they have forgotten about it. Any idea what's causing it?
One question (because I had exactly the same problem coming back yesterday from several months away) - had you previously changed your useroptions.ini file to read only and/or set it for ultra settings? Today I changed everything to a value of no higher than 3 in my ini file and set it back to read-only and I was able to log onto my main character for an uninterrupted session after crashing every five minutes the days before (despite being able to use my character from a different faciton without problems the whole time).