drop-down lists in editable datagrids

[meeps]

One of the fields in an editable datagrid is a drop-down list with two hard-coded list items. In view mode, the records display the correct value in this field, but whenever I switch a record to edit mode, the drop-down list always contains the first of the hard-coded values instead of the records corresponding value. What could I be missing that would cause the records value to be ignored?

thanks