We had a very similar issue. I think the problem is the space in the Username. Can you move the sfx folder to just the C: drive so it doesn't have to go through the User account with the space? When you launch sfx it needs to make two other files, sfxlib.jar being one of them. I forget the name of the other. Even if the files exist already, the space in the Username is problematic for the system finding them.
We ended up making a different user account with a name without spaces and it worked just fine for opening. Although we haven't been able to get it to open with Driver Station. (
http://www.chiefdelphi.com/forums/sh...93#post1327293)
I hope this helps!