Thank you for the post! Since you have replaced the router in your home, you would need to resync the Slingbox to the new one. To do this, you would need to perform a factory reset and reconfigure. To perform the reset, you would hold the reset button down until the lights on the front of the Slingbox flash rapidly. After the reset, you would continue to Slingbox.com/get/getstarted and choose Setup Slingbox: All other Slingbox Devices and follow the steps on screen.
If you have any other questions, feel free to respond or call us at 1-877-467-5464. We are open seven days a week, 10:00am to 10:00pm EST.
The Sling Media Moderation Team