I have found this to be a common problem, and I've done everything that I know to make it work. 
Custom_story_settings.cfg
<Main
	Imgfile = ""
	Name = "Tutorial"
	Author = "Campbell"
	MapsFolder = "maps/"
	Startmap = "01_cailen.map"
	Startpos = "Playerstartarea_1"
/>
and my extra_english.lang
<LANGUAGE>
		<CATEGORY Name="customstorymain">
<Entry Name="description">
This is a tutorial.
</Entry>
				
		</CATEGORY>
		
</LANGUAGE>
My 01_cailen.Hps is 
void OnStart()
{
}
void OnEnter()
{
}
void OnLeave()
{
}
I have a custom story downloaded and it works fine, and everything is identical to mine. I am out of ideas, can anyone spot where my mistake is please?
 
Ty!
*I can email my map if anyone would care to check it for errors.