Rest Sender Polling HTTP Header Variables not being included.

Hi all currently running PO 7.4 SP11 and trying to use the REST Sender Polling Adapter.

Ive had trouble connecting to a service provider so I have used TCPMON and a mock service to debug and Ive found that the HTTP Header's are not being included from configuration.

Are HTTP Headers in Rest Polling Broken ?

Here is what the adapter looks like

You can see in TCPMON that the Headers are not coming through

When the call is made from SOAPUI with the equivalent setup this is how it looks