code generating compile error: syntex error

my code is given below..i am using 2010 version of excel
Sub GuessName()
Msg = “Is your name “ & Application.UserName & “?”
Ans = MsgBox(Msg, vbYesNo)
If Ans = vbNo Then MsgBox “Oh, never mind.”
If Ans = vbYes Then MsgBox “I must be clairvoyant!”
End Sub