Every render server must have all the plugins and texture maps in their proper directories loaded so that the scene you are sending does not cause them to abort. For example, having a PHOENIX plugin used in the scene causes a server failure in any of the servers that do not have the PHOENIX plugin installed. If you have mapped your object with a file named JUNGLEMAP.JPG and you do not have that map in the BITMAPS directories of the render server installation - you will get bucket rendered at that machine as if the map was turned off, unless you also turned on the Check for missing files option in the V-Ray System rollout, in which case the render server will refuse to render the scene.
When you cancel a DR rendering, it may take some time for the render servers to finish working and they may not be immediately available for another render.
Default lights are not supported in DR mode and do not render. If you need any lighting in the scene, you should add it explicitly. The default system temp folder, usually C:\Users\<username>\AppData\Local\Temp on Windows (%TEMP%), is used for copying the assets if the VRAY_ASSETS_CACHE_PATH environment variableis not set. V-Ray DR can be run automatically as a Windows service whenever the machine boots up. For more information, see Set Up V-Ray Render Service.
If you see a 3ds Max window flashing on the taskbar and then disappearing, right-click on the V-Ray DR spawner icon in the taskbar tray, select Exit to close the DR spawner, and try running a regular Backburner job with this machine as the server. After that, try to start the V-Ray DR spawner again.