2 OptionButtons if value is false on both of them.....

[asdfw]

2 OptionButtons if value is false on both of them then show error message after that let user go back to select optionbuttons again or start all over again
How I can do that? I spent many hours for this but not success. Thank you very much.

 

[asdfw]

this code is not working

If OptionButton2.Value = False And OptionButton3.Value = False Then MsgBox "Go back to select car"