Thanks for reaching out to us in the land of the forums,
You mentioned that you got a new Router. When this happens, it is always best to reset your Slingbox. Down below, we have included a link that will explain more about this and also on how to reset your Slingbox.
How to reset your Slingbox to factory settings
Also, it is possible that due to the new router, you will need to go in and set the Port Forwarding, this will allow the entrances (the ports) to your home network. Below is more information on doing this:
How to use the Slingbox Network Setup Assistant to help configure your router
Hope this information helps:
The Slingbox Moderation Team!
We understand that you have a new router and your Slingbox can't connect to the network.
Here is an article that may assist you with this issue.
Hope this information helps,
Sling Moderation Team