Including columns with SQL Server Allow Nulls Checked

Why is it that when I include a column from my SQL Server database table, which has it's Allow Nulls checked, in the data source of a control that the record becomes not update-able? How do I get around this?

If your record is going to have null values in it (which is quite common) you have to add a DataSet file to your site, create a TableAdapter and then use the TableAdapter as the data source 'Object' for the data control. ... ... Wait, ... let me breath... ... that's not the end of it... ... ... When choosing the data source for the control, make sure when you get to the Define Parameters dialog that the advanced property ConvertEmptyStringToNull is true. It took me about 12 hours to figure this out but I have also read that it has taken others up to a week so I guess I'm doing good. I REALLY WISH MICROSOFT WOULD HAVE SPELLED THIS OUT MORE CLEARLY IN THEIR HELP FILES.