Connect to SOAP web service

Hi,

I am trying to connect my contact form to send data to a SOAP web service.
I have created a function which hooks into wpcf7_mail_sent and retrieves the posted data fine using.

$submission = WPCF7_Submission::get_instance();
if ($submission) {
		$posted_data = $submission->get_posted_data();
}

However the web service takes an XML string with the data which I’ve built using DOMImplementation and the posted data array above but when I test it all I get is a spinning circle – though the email confirmation from Contact Form 7 is still coming through.

I am sure the XML is valid as I have used the same code on another form without problems aside from changing the variables to match the array.

I’m just wondering has anybody else sent data using a SOAP web service with Contact Form 7 and how to go about it?

Many thanks in advance.