Done... I tried to send a photo and a video with no joy.
Unfortunately, it appears to have incomplete firmware support for DMR. Your dump was a bit tough to read through since it's got windows media player stuff in it but the pertinent chunk of dialog is here (abbreviated):
MC GET /dmr/SamsungMRDesc.xml HTTP/1.1 (we ask for the sammy device description)
Sammy (it replies, along with other stuff, that in the service list there is a rendering control url)
blah blah blah
<friendlyName>TV-46C6400</friendlyName>
<manufacturer>Samsung Electronics</manufacturer>
<manufacturerURL>
http://www.samsung.com</manufacturerURL>
<modelDescription>Samsung DTV DMR</modelDescription>
<modelName>Samsung DTV DMR</modelName>
<modelNumber>1.0</modelNumber>
<modelURL>
http://www.samsung.com</modelURL>
blah blah blah
<serviceList>
<service>
<serviceType>urn:schemas-upnp-org:service:RenderingControl:1</serviceType>
<serviceId>urn:upnp-org:serviceId:RenderingControl</serviceId>
<controlURL>/upnp/control/RenderingControl1</controlURL>
<eventSubURL>/upnp/event/RenderingControl1</eventSubURL>
<SCPDURL>RenderingControl1.xml</SCPDURL>
</service>
blah blah blah
MC GET /RenderingControl1.xml HTTP/1.1 (so we ask for the rendering control)
Sammy (it replies, oops, I don't have one)
HTTP/1.1 404 Not Found
Connection: close
Content-Length: 0
Server: DMRND/0.5
Unless the firmware is upgraded to provide a rendering control, it's the end of the story.