Try to port forward the router to port 5301. Here's the link that would help you to portforward http://http://support.sling.com/sitecore/content/Support/KB/KB-2000068?sc_lang=en-US
Hope this would help.
That doesn't make any sense. Chromecast works, it just loses connectivity. It is not happening when using the Chromecast for other uses. If the proper ports were not being forwarded it would not work at all.
I see no reference to port forward port 5301 anywhere. For slingbox the port is 5001, which is the same as the SOLO I had before it.