Please help me with problem on SE V PBW

[Dogboy]

Thanks. Still encountering a problem:

When I try to join my own game, I am asked to enter
"Empire password" and "Empire name". For the first, I enter the password I used to password protect the empire I made. For "Empire Name" I enter the name of my empire as entered when creating the game. Then, I get a text message downloaded to my desktop that says:

"Cannot execute player command: Empire name is invalid"

Do I need to enter the file name of the file I created for my empire, and if so, with or without extension?

Thanks!