Logon failure on IIS Smooth Streaming Management REST Services

 Hi all,

I'm having problem with using REST services for managing publishing points. My publish points are all working and streaming works fine, but when I try to simply get list of my publishing points with REST API and I get this response

 <?xml version="1.0" encoding="UTF-8"?>
<SmoothStreaming xmlns="http://schemas.microsoft.com/iis/media/2011/03/streaming/management">
    <Error>
        <ErrorCode>0x8007052E</ErrorCode>
        <ErrorMessage>Logon failure: unknown user name or bad password.
        </ErrorMessage>
    </Error>
</SmoothStreaming>

this is the response when I try GET request on this url: http://localhost/services/smoothstreaming/publishingpoints.isml and when I provide login and password (basic authentcation enabled) for user that have asses to isml files.

What do I need to do to get this working?