Cannot publish dataset within Data Hub

Question

Hello,

When I try to publish a dataset within Data Hub, I get the following error:

All queryable columns must be indexed: Not all queryable columns in table "DHD_LMD" are indexed. The columns that are not indexed are: "Besteldatum", "Code (Z-Indexnummer)", "Duur geneesmiddel", "Eenheid", "Etiketnaam", "Inkoopprijs per stuk", "Netto-Aantal", "Toedieningsvorm", "Transactietype", "Type ziekenhuis 1", "Type ziekenhuis 2".         

I have created a non-clustered index for each of those columns on my SQL Azure DHD_LMD table. 

What goes wrong?

Thanks,

Arnoud