make sure a few things here... You have saved the game (Most important)
- Next make sure you have a script on the game (If you go to file/map properties, next to script it says something)
- Next if you saved the game in a different location, make sure the script file is in the same location
- If you started with a blank script you need to have the lines:
Code:
function main()
{
  level_load("Filename of level.wmb"); // Make sure it's wmb not wmp
  wait(3); // For triple buffering
}

And that should solve the problem