wrong was :
MyTrainer.hide()
 CETrainer.show()  --wrong
local int=getInternet()
  URL="http://cheatengine.org/loginexample.php?username="..MyTrainer.edtUsername.Text.."&password="..MyTrainer.edtPassword.Text.."&is64bit="..tostring(cheatEngineIs64Bit())
  s=int.getURL(URL)
  int.destroy()
  load(s)()



MyTrainer.hide()
local int=getInternet()
  URL="http://cheatengine.org/loginexample.php?username="..MyTrainer.edtUsername.Text.."&password="..MyTrainer.edtPassword.Text.."&is64bit="..tostring(cheatEngineIs64Bit())
  s=int.getURL(URL)
  int.destroy()
  load(s)()
  CETrainer.show() --work