Thank you for contacting Slingbox Forum. I am sorry you are having connection issues.
Is sounds like you need to be sure that the Internet Viewing Test has been passed on the Slingbox and router at the home network computer on Slingbox Setup. When this is 'Ready for Internet Viewing' then the purchased Apps for the mobile devices will provide the video connection to your home network.
Hope this helps with your issue!
Have a great day!
Sling Moderation Team