Sorry you are experiencing this with your Surface Computer.
The issue you are experiencing is with the Surface Pro's operating system. The Surface Pro's operating system prevents the SlingPlayer for Web Plug-in to work correctly.
Due to this, Sling Media created the SlingPlayer for Windows 8 application that customers can place on Surface Computers or Windows Tablets. Unfortunately, the only way a Surface Computer will work with any SlingPlayer, will have to be with the SlingPlayer for Windows 8 application.
Sling Media Moderation Team
While I can agreee with that for a surface RT this is a surface pro 3. This has a fully working internet explorer in desktop mode. Youtr product would not work. Are you telling me that Microsoft made a special windows 8.1 just for the surface pro?
As you pugin says it works with IE in desktop mode. The surface pro 3 runs Windows 8.1 pro There should be no reason for me to have to buy an app for this.
This is one of the reasons I will probably never buy another sling product. The slignbox costs enough to buy. I should not have to pay for the app to watch it on a mobile devise or another computer.