So, I have been using MiniDLNA for about 6 months now and just finally got it working with my Xbox360.
It works perfectly with my Samsung TV which has DLNA to view videos over the network but I stuggled to get it working with the Xbox.
I followed all the guides which said to change the following
but I has changed my Serial Number and Model Number from the defaults.
This was the issue! The Serial and Model numbers NEED to be numbers and not text and not include any spaces.
Once these are set you have the xbox360 and MiniDLNA working perfectly!
I highly suggest using MiniDLNA if you require DLNA software, its small, simple and works perfect.