Databound UserControl

I have created a user control which is to be dound to a database.
I have set DataBindingBehavior to vbSimpleBound

Through the Procedure Attributes I have bound one of my properties to the DataField.

The control complies and allows me to at design time to site the control and set the datafield
property.

When I attempt to set the datasource at runtime I get the following error:

"Run time Error 545
Unable to bind to field DataMember: 'fieldname'"

The microsoft knowledge base tells me that the record set I am trying to bind doesn't have the field named in DataField as one of it's fields. This is not the case. I have even stepped through the code and checked the Fields collection of the datasource prior to binding. It is definately there.

Any Ideas?