Thank-you for contacting Slingbox Forum.
If you have a new router connected to your Slingbox, you will need to reconfigure the Slingbox to the new router.
To do this, you will go to setup.slingbox.com and redo the "Internet Viewing Test". This will automatically attach the new router to the Slingbox. This process must be done at the home network where the Slingbox is located. You will then be able to view your Slingbox remotely.
Hope this helps with your issue.
Sling Moderation Team