PlanetsCentral

I'm new here (but not to VGAP), and I'm probably missing something obvious. I joined one of the 4 running games with open slots (Titan 6) and can't figure out how to play. I see a file manager with only a fizz.bin in it. It prompted me to upload my own so I did. I see the link to play online, which asks me which key to install, so I click mine and it tells me "There was an error processing your request: 404 Not found Click OK to go to the home page, or use your browser's Back button and retry the action.". I normally prefer to play with VPA. I assume that should be possible on this site? What am I missing?