Problems with seing http request over curl

[mybikeisace]

I am trying to use curl to access the web service at http://www.carwebuk.com/carwebVRRB2B/CarweBVRRWebService.asmx?op=strB2BGetVehicleByVRM

Here is my code:

 $url = "http://www.carwebuk.uk.com/carwebVRRB2B/CarweBVRRWebService.asmx/strB2BGetVehicleByVRM";

$post = "strUserName=string&strPassword=string&strClientRef=string&strClientDescription=string&strKey1=string&strVRM=string&strVersion string";   

$header[] = "POST /carwebVRRB2B/CarweBVRRWebService.asmx/strB2BGetVehicleByVRM HTTP/1.1";
$header[] = "Host: www.carwebuk.uk.com";
$header[] = "Content-Type: application/x-www-form-urlencoded";
$header[] = "Content-Length: ".strlen($post);
$header[] = $post;


   $ch = curl_init();
   //curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_URL,$url);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_TIMEOUT, 4);
   //curl_setopt($ch, CURLOPT_HEADER, 1);
   curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
   //curl_setopt($ch, CURLOPT_POSTFIELDS, $post); // add POST fields 


  $data = curl_exec($ch);       

       if (curl_errno($ch)) {
           print curl_error($ch);
       } else {
           curl_close($ch);
           echo $data;
           //returns <xml>...</xml>

Whhich just returns a error "Operation timed out with 0 out of -1 bytes received"

Tried sending the $post variables with CURLOPT_POSTFIELDS but this just results in "System.InvalidOperationException: Missing parameter: strVersion. at System.Web.Services.Protocols.ValueCollectionParameterReader.Read(NameValueCollection collection) at System.Web.Services.Protocols.HtmlFormParameterReader.Read(HttpRequest request) at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters() at System.Web.Services.Protocols.WebServiceHandler.Invoke() at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()"

Anyone any idear?