Shoutbox

I've downloaded it before alongg time ago, and well some error came up the other day, and msn shut down, I started it up against and the Plus! Wasn't working it had been unistalled or something, I re-downloaded it and stuff, and it was still the same, and i went to the menu, it told me to re-download which i did, cause it messed up in the download and it still won't work, so I need some help here !