Error Type:
msxml3.dll (0x80072F0C)
A certificate is required to complete client authentication 

I am sending an XML file to a remote server

putUrl =https://www.myweb.com/test/drhandler.php
xml_put = "<?xml version=""1.0""?><subscription id=""" & "14" &"""><status>" &"das" & "</status></subscription>"

Public Function SendBatch(xml_put,putUrl)
   Set xmlhttp = CreateObject("MSXML3.ServerXMLHTTP")
   xmlhttp.Open "PUT", putUrl , False
   xmlhttp.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
   xmlhttp.send(xml_put)

   Set xmlhttp = Nothing
end function

Any help out there?