Thank you for using the Slingbox Answers Forum. We are sorry that you are having this issue. i have attached some links below that I hope will be helpful in finding a resolution to the issue.
Some of my channels are missing in SlingPlayer. I can view them the regular way on my TV, so what's going on?
When I connect my set-top box to my TV with HDMI connections, I can't stream video at all using any version of SlingPlayer. Why?
Hope this helps,
Sling Moderation Team