For Excel 97 they say(http://support.microsoft.com/kb/196620):
You can drag cells on the worksheet to move data from one cell to another. However, this feature does not work if you are running GetRight Monitor and have the Monitor Clipboard option selected. This option makes the GetRight program a clipboard viewer. Because Excel uses the clipboard when you drag cells, GetRight temporarily intercepts this event and Excel is unable to process the requested action.