I finally gave up and am seriously considering uninstalling this game, because what's the point of having a program that refuses to run?
OH NO! You're going to UNINSTALL the GAME? What are we ever going to do!?
Other than that, you caught us at a buggy time. The global login hasn't been implemented for very long, and it's buggy, but there are just a few who can't get it. So, I'm pretty sure you're just doing it wrong.
1. Yes, I am using the right password. You are just being a prick, Paintball.
Someone's bitter... but that's something you should always check. Speaking of passwords, try changing yous, as kilo suggested.
2. I want to uncheck the save password box otherwise you fill it up with infinite spaces and then refuse to recognize it.
Err, that's just your saved password. Not spaces. Either way, it's your choice.
3. I want to change my name, so stop putting me back on the same one over and over again.
The menu system is kind of really bad at textboxes right now. Use the console to set your 'nick' for good, by typing 'nick *yournamehere'.