How to use third party RDP clients through RDPCOMAPILib server

Hi,

I've developed a client and server application using Windows Desktop Sharing API according to the blog below: 

http://blogs.msdn.com/b/rds/archive/2007/03/23/writing-a-desktop-sharing-application.aspx

Both client and server app are working properly but I'd like to know if it's possible to use a third party RDP client like, for example, Windows Remote Desktop or FreeRdp, to connect to my server application?

I have tried several times to connect with both clients on my server application and none of them worked. I'm not sure if the problem due to authentication or something else.

The way that I'm generating the Invitation String used on my application is:

IRDPSRAPIInvitation pInvitation = m_pRdpSession.Invitations.CreateInvitation("WinPresenter", "PresentationGroup", "", 8);

and the generated output XML is:

<E><A KH="QbNcOYYPa8ZrO5MJRumuMMix6CQ=" ID="WinPresenter"/><C><T ID="1" SID="0"><L P="55372" N="192.168.173.1"/></T></C></E>

So, supposing that either Windows Remote Desktop or FreeRdp are able to work (connect) with my server app, what values should I set (User, Password, etc) to be able to connect? So far I've tried "WinPresenter" as user name and "" (empty string) as password but didn't work.

BR

Gava