Jm, any new solutions for the DTP? I'm having the same problem, I can null a date in the sql server with code and it saves fine, it's just the DTP control, when it runs over a null record it shows the value of the previous record, btw, the DTP works fine in a datarepeater for me with the checkbox but I want to get away from the datarepeater, thanks dotnet 3.5sp1