D5 TTreeView Not Working Correctly Anymore... Help

I have an appliction written under D4/sp3. One of the forms has a TreeView
working correctly. When recompiled under D5, it seems that the TreeView
control continually keeps refreshing the same node (thus not allowing the
screen to paint itself until you drag the scroll bars). If you expand the
node and select another node, it stops doing this continuous refreshing,
although it is not consistant.
Any Ideas?????