Adding cascading list by XLS to the Kobo formbuilder

I have been trying to add cascading list through the XLS upload in the kobo form. When i copy the excel data list, it says “OK” in the kobo cascading option and i click on “Done”. But it does not add in the Kobo form. Another question, how do I know that i am using the beta version of Kobo. How can i check it out.

Your kind support is much appreciated.

Many thanks.

Kyaw Khin