Database update/save problem

[Specter93]

I have a form that is connected to an sql database, and uses a bindingnavigator to scroll through records, add/delete/save etc. (shows data in text boxes on the form)

My problem is that when I attempt to change any of the data, I will get the following error when attempting to save: Update requires a valid UpdateCommand when passed DataRow collection with modified rows.

I've tried messing around with it a bit, like I tried just updating that specific table instead of updateall, and that looked like it worked but it never actually saved when i reopened the program. I don't really understand how to create a "valid updatecommand" so hopefully someone could explain this to me..

Thanks