i have the same problem dude, i dunno how to fix
your not alone though
hey i fixed my problem
if you are making your own stories, you need a file like this
ImgFile = "Image"
Name = "Can´t Remember"
Author = "MarvStudios"
MapsFolder = "maps/"
StartMap = "Can´t Remember.map"
StartPos = "PlayerStartArea_1"
save as a .CFG file. you can open it in notepad to write it first, but make sure you save as a .CFG file.
this is for the custom story "cant remember". its a bit of code that tells the game that your story should be put in the custom story list. it also lets you stick an opening image with it among other things.
just copy/paste this in notepad and replace the words inbetween the "" to what you want, make sure that in the bottom half, you put word for word what you have named your story previously.
if you downloaded your stories, like i did, make sure that each folder that contains a story is accessable from your custom_stories folder. all my stories were in one folder which is why it didnt work
hope that helped