Hi Peter,
Did you fill out the other MRU related properties (i.e. MruID, MruSection, and MruRegIniFile) as described in the help? MruPath is the old way to specifying the Registry path, it is recommended to use the mruRegIniFile property.
The LoadMRUData method is used to force a reload of the combo box with the list of most-recently-used items from its persistent storage defined by the MruRegIniFile, MruSection, and MruID properties, but in practice should rarely need to be used. The list will get saved and loaded automatically.
Ray