Are the POI files the same in 2.0 as in 2.4 or did you use different ones?
Make sure the POI folder is in the correct spot and called POI? (not POIs or PDI or ....)
The 2.4 content folder should look EXACTLY the same as the 2.0 content folder.
If that all is as should be, rename the "save" folder to "save_old" and restart. Then do the settings again.