what does "invalid user" mean?

[Papa Deuce]

Does that mean that someone has been kicked off the DIS? I know this person's screen name, and she sent me a PM.... so now that I try and search for a post by her, it come up "invalid user".

EDIT: NVM..... she had no space between her two word in her name. I never noticed there was no space.

 

[Pop Daddy]

that means your invalid