>Exception Details: System.ArgumentException: Column 'FirstName' does not belong to table Users.
>
>Source Error:
>
>
>Line 78: Dim User As DataRow = Me.oUser.DataRow
>Line 79:
>Line 80: User(Me.oUser.FirstNameField) = Me.txtFirstName.Text
>Line 81: User(Me.oUser.LastNameField) = Me.txtLastName.Text
>Line 82: User(Me.oUser.UserIDField) = Me.txtUserId.Text
>
>
>I didn't change any code in UserAdmin.aspx. May I know what is the possible reason causes this exception?

Does your Users table have a FirstName column?

Best Regards,