Are they on different accounts? The characters are saved to the server so the account should have access to any characters saved to the account via the server.
Maybe something screwed up on my account, but I can't find her on my desktop. My old character still exists on my laptop, and I don't have it with me to see if I would be able to access my new character. I
did try to copy over the old's .bic file to my new computer, and she appears in single player mode as a pregen character, but not when I access the character list for Ravenloft.
If I have to remake her, so be it... but I'd rather keep her data as I had it before, you know?