Table Adapters ADO 2.0

I am using a table in SQL which has a Date field which allows Nulls. I have
created a table adapter in order to manipulate this table. So far so good.

This field is 'RequiredByDate'.


If I create an Insert method in my table adapter and pass the function a
null, when I run that function, it fails and tells me that



throw new global::System.Data.StrongTypingException("The value for column
\'RequiredByDate\' in table \'tblIssue\' is DBNull.", e);

There is a member function which allows you to set the RequriedByDate's
column's base type to DBNull, but this seems to conflict with the property
for this column,

In Short. How do I set a value to Null using a table adapter function
without generating these exceptions. ?