Combo box no data

Hie Guys,

I have a query in QAAWS that produces the sample output before publishing. I have published the query and used it as a data connection in Dashboards 4.1 (Development Client Tool). There are 5 objects from the query which I have mapped to 5 empty columns in the Excel Spreadsheet in Dashboards 4.1.

Now, I have a combo box inside the dashboard. For the labels (Properties), I have selected the first column from the Excel Spreadsheet. However, when I preview the dashboard, I am not getting any data in the combo box selector. Could anyone tell me why this could be happening and how to resolve the issue? Thanks.