Send and SendPlay has issues with sending some “special chars” properly.
So I’ve done a simple function that “Safetize” your string to be send correctly. Hope be useful!

To beginners: Just put code below in a text file with a .ahk extension. Open it with autohotkey and press Ctrl+0

  ;##############################################################################
  ;Some chars are not sent properly by "Send" or "SendPlay" command.
  ;Use this function to get around this issue
  ;Version 1.0.2 Marcelo Gennari
  ;##############################################################################
  SafeSend(string) {
   local varStringOut := ""
   Loop, parse, string
   {
    If (InStr("!#+^{}/", A_LoopField, True) > 0) {
     If (A_LoopField = "/")
      varStringOut := varStringOut . "{ASC 47}" ; "/" has as special action
     else
      varStringOut := varStringOut . "{" . A_LoopField . "}"
    } else {
     varStringOut := varStringOut . A_LoopField
    }
   }
   return, %varStringOut%
  }

  ;Test SafeSend (Ctrl+0)
  ^0::
   varStringToBeSend := "!""#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVW"
   varStringToBeSend .= "XYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~€‚ƒ„…†‡ˆ‰Š‹ŒŽ"
   varStringToBeSend .= "‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇ"
   varStringToBeSend .= "ÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ"
   run, notepad
   WinWaitActive
   varSafeStringToBeSend := SafeSend(varStringToBeSend)
   SendPlay, {Space 3}With SafeSend: %varSafeStringToBeSend%
   SendPlay, {Enter 2}
   SendPlay, Without SafeSend: %varStringToBeSend%
  Return