question about New-WebServiceProxy over https in powershell 3.x

Good Day!

Can someone please help me find an answer on 'How to get the response from the Remedy ARS webservice over https in powershell 3.x' ?

One of the ways I've tried is to have the webservice object created with the below step and I see the below errror.

New-WebServiceProxy : The HTML document does not contain Web service discovery information.

At line:2 char:9

+ $myitsm=New-WebServiceProxy -Uri $uri -Namespace ITSM

............

............

What is happenning is that the Remedy ARS system is feeding/responding with a Logon Page and the new-webservice cmdlet doesn't find any WSDL in there. So fails to proceed.

Here is how I tried which works for http(Dev) but not for https(Prod).

 $ARSuri=’https://coreweb.itsm.env.srv.yourcompany.com.au/arsys/WSDL/protected/coreapp.itsm.env.srv.yourcompany.com.au/HPD_IncidentInterface_WS'

 $myitsm=New-WebServiceProxy -Uri$ARSuri-NamespaceITSM

What's the best way ? 

Let me know if I need to provide any further info.

Thanks in advance.