I am having a problem binding a DropDown list control to a view. The strange thing is that the code used to work, and actually still works for customer but I wanted to check something and when running the page I am hitting this error.

The error is :

Specified argument was out of the range of valid values. Parameter
name: value 

The error is in the following segment of code:

cmbBuildings.DataSource = bldView;  
cmbBuildings.DataTextField = "LongName";
cmbBuildings.DataValueField = "FldValue";
cmbBuildings.DataBind();   // This is the error line

The view bldView is based on a dataset and the dataset is created from an XML file. The XML is very simple and I have not change it for a long time.

Any suggestion what I should check, please?

Thank you.