[LVL ED] FATAL ERROR

[hammerman469]

I keep trying to get the first area of a custom story im working on to load but everytime I click on the map in the main menu an error message pops up. I've already checked out some of the threads but the way the people are saying it im not getting it. I'm working on my first level and im doing it with tutorials im checking out on youtube. I can't get anywhere though. This keeps popping up everytime I try to load the level.

FATAL ERROR: Could not load script file
'custom_stories/Experimentation/maps/Experimentation.hps'! main (1,1) : ERR :Unexpected token ':'

Please help :/ Im so new at this and im suckin at it horribly :/