Thank you for contacting us here on the answers forum and i am sorry that you are having a problem connecting outside your home. I believe that this issue can be cured by port forward your router. I will put a few articles at the bottom of this post to help explain what port forward is and what you would have to do to get that port forward setup.
Hope that helps,
Sling Moderation Team
Only 5 months for help from Slingbox! Too bad I threw the thing away (or had someone throw it away as I am on the other side of the planet!) four months ago. Port forwarding will make a remote start to work? It always worked before and I never messed with the ports. Lucky for me, Dish has their own Sling Box and when you order it a guy comes to set it up. If you have problems with it, they have people that answer the phone.