Thanks for using our Answers Forum. I understand that you are having trouble with your Slinglinks and being able to access your Slingbox since you replaced your router. I do have a couple of articles that will help you with this issue.
I would recommend as well, that you take your Slingbox and connect it directly to the new router for the inital reconfigure and then add your Slinglinks back into the mix.
Hope this helps.
Sling Moderation Team