It seems that you are having some issues with your Slingbox since it does not show a solid network light.
According to the information provided, the root cause might be related to the fact that your router is not able to provide IP addresses. With this in mind, I recommend you to reset the router and the Slingbox. Then, you should be able to run the Setup Assistant for Internet Viewing. The following link will provide you with some steps to follow in order to fix this issue:
If the issue persist, I encourage you to connect the Slingbox in a different network (hook it up to a different router) in order to determine if the issue is related to the Slingbox or not.
Hope this helps!