Yes, that is the manual I was following.
I have about 50 datasets, all with about max 10 rows.
I allready encountered a problem that some did not have a description, or the description of the dataset was the same as another. I renamed the descriptions for these datasets by hand in the database to be imported.
The strange thing is, some ( about 8 ) datasets are imported correctly.
All data in the datasets is just plain text and numbers. (All strings) No list are used as far as I can see.