how do i send a datasource getvalue into an array

Help - I am trying to get values from a datasource into my array (which I will then use for sorting before populating a matrix). I get the following error:

Form - Reserved/Illegal form Unique ID [66000-2]

code getting the error:

Dim lbpname As String

lbpname = oDBDataSource.GetValue("CardName", oDBDataSource.Offset)

What other methods can I use to get the values from my datasource? Or how can I make the above work?

thanks