How do I un-select and un-focus a listview control item?

Hi,

I have a C++ COM server code where I have a list control in a dialog.  It's working fine in W2k server but in Win2003 it doesn't work right when I click to select other item it doesn't move the focus and select the new item.  Now I have to code it so it will select it.  I got the select part but how do I de-select and un-focus the currently selected item?  Thanks.

To select and focus:
            ListView_SetItemState(hwndListView, index, (LVIS_SELECTED | LVIS_FOCUSED), (LVIS_SELECTED | LVIS_FOCUSED) );