Rule #1 - whenever you get that dark sky, almost INVARIABLY, the name of the file is being entered wrong. (It is not a matter of case - I tested it both as ThorDemoProblem and thordemoproblem.) Using the launcher means you are selecting a file; using a prompt means you are typing it.
EDIT: Problem #1 - you have multiple PLAYER entities. Pick one. Preferably one that's reasonably close to your CAM coordinates or your characters won't be visible. Having them that closely clustered is not a problem in itself, but it's a sloppy habit to get into.
EDIT: Tested it from my LIVE client - it plays just fine.
Michelle
aka
Samuraiko/Dark_Respite