Hi, well I have my users table and my department table, so I have in XAML a Datagrid and a Dataform, in my dataform i have a combobox that is filled from the department table (all possible departments), I bind it to the Department attribute from my user, and it shows it. The problem is that when I click the edit button of the dataform the combobox goes blank... if i cancel the edit it goes back to the department of the user. Another thing is if i edit the user and choose a department when i commit the edit it works and when i edit that same user the combobox doesnt go blank now ... but for the other users it does if i havent specifically choosen the department in the combobox.