Salem

I get about 8 syntax errors, and then my client randomly closes after awhile and when I try to log on it says "you are already logged in"

Any ideas on how to get my client running like normal?

Could you please post an error report?

Yes, definitely post the errors received. Nobody can attempt to help you without those. Please use the "code /code" tags for them, too, so they don't occupy a large space.

As far as "being logged in", the system isn't closing out javaw.exe for some reason. If you're running into this open task manager (or the equivalent in your OS) and kill the javaw.exe process. You should be able to log in now.