Starcraft problem

[Canyarion]

I used to play (an illegal version of) Starcraft a couple of years ago. I almost beated the game, I was down to the last level when I got tired of it.

Now I have a legal version and I'm trying to get my old save files to work. I just placed them in the proper directories, made sure they weren't 'read only'.
That didn't work, the username/files didn't show up in the game. So I figured I had to recreate the username and suddenly the game would recognize the files.

Nope.

Does anyone know how to fix this?

Of course I could just create a new username and use cheats to fast-forward. And that's what I'll do if you don't have another solution.