[AccessD] Access error 2101

Folks,

I have an Access 2007 application that has developed a problem in a
relatively simple data entry form. When a record is created or edited I have
a save button that uses Me.Dirty = False to explicitly save the record or
changes. I now get an error on this line saying "Error 2101 (The setting you
entered isn't valid for this property.)" This is new to me as I use this
method all the time. 

Can anyone on the list give me any insight into what might be causing this.

Thanks in advance.

Doug