on close i use

Code:
My.Settings.SET20 = Form4.TextBox3.Text
My.Settings.SET21 = Form1.ComboBox2.SelectedIndex

on run i use
Code:
Form4.TextBox3.Text = My.Settings.SET20
ComboBox2.SelectedIndex = My.Settings.SET21
and then i get this error at runtime, but only the first time. Once i run it the second time its good from there on out



Help?