HTTP request to get around Kerbos/NTLM authentication error

Hi:

I have the following method in a buisness operation that works on localhost but not on our server . I think it's how the firewall is set up but i was wondering if there is a known way around this. It can't correlate XML as it returns a "The browser did not send any authentication information" error. I tried adding in username and password to http request to no avail. We could do a c# proxy on a server but i'm wondering if there is a known way to fix this error within intersystems. As a developer we don't have too much control over our Intersystems TIE server. 

Method GetGPStatus(pRequest As Penn.EDT.Messages.GetGPStatusRequest, Output pResponse As Penn.EDT.Messages.ODSGPStatus) As %Status
{
Set pResponse = ##class(Penn.EDT.Messages.ODSGPStatus).%New()
Set rdr = ##class(%XML.Reader).%New()
    set httprequest = ##class(%Net.HttpRequest).%New()
    set httprequest.SSLConfiguration = "test"
    set httprequest.Https = 1
    set httprequest.SSLCheckServerIdentity=0
    
    Set tSC = rdr.OpenURL("https://directory.spineservices.nhs.uk/ORD/2-0-0/organisations/"_pRequest.GPCode_"?_format=xml",,httprequest)
 if $$$ISERR(tSC) quit tSC
    do rdr.Correlate("Status","Penn.EDT.Messages.ODSGPStatus") If 'rdr.Next(.gpxml,.tSC) || $$$ISERR(tSC) { If '$$$ISERR(tSC) Set tSC = $$$ERROR($$$EnsErrGeneral,"Failed to correlate GPStatus")
Quit tSC
}
set pResponse.Status=gpxml.Status
    quit tSC
}