ColdFusion - CFHTTP (https) sending request over port 80

I am using CFHTTP to connect to a server and post some parameters. I have successfully imported the certificate.

<cfhttp url="https://xml.proveid.experian.com/IDSearch.cfc" method="post" result="response" port="443">
    <cfhttpparam type="Header" name="Accept-Encoding" value="*"> 
    <cfhttpparam type="header" name="content-length" value="#len(arguments.xml)#"  />   
    <cfhttpparam type="xml" value="#trim(arguments.xml)#" />
</cfhttp>

As you can see the request is for port 443 but the error I got back is:

struct Charset [empty string]
ErrorDetail Connect Exception: Connect to xml.proveid.experian.com:80
[xml.proveid.experian.com/194.60.180.108]
failed: Connection timed out: connect
Filecontent Connection Failure Header [empty string]
Mimetype Unable to determine MIME type of file.
Responseheader struct [empty]
Statuscode Connection Failure. Status code unavailable.
Text YES Connection Failure. Status code unavailable.

Can anyone explain why the request is made on port 80?

Solution

It seems that the specific web service doesn't play well with CFHTTP. So this approach solved the problem.

<cfset args.xml = 'xml value'>

<cfinvoke 
                webservice="https://xml.proveid.experian.com/IDSearch.cfc?wsdl"
                method="search"
                returnvariable="aTemp"
                argumentCollection="#args#"> 

</cfinvoke>