What I'm getting from your post, is that you're having problems, getting the Slingbox to connect with the network.
In this case, you can check the following link, which will help you out with that:
If the problem is still the same, make sure the router's up to date, and you can also contact the Sling Media Technical Support to troubleshoot over the phone, or get one of the replacement options, based on your Slingbox Warranty Status.
Hey mattx7 I've got the same problem with my slingbox not showing up on my network although the network lights on my slingbox and slinglink are all lit up like they should be, when I wire my slingbox to my laptop and connect to the network wireless it works fine, but when I wire it back to my desktop it can't. Be found on my network, something is blocking the slingbox, my ports say active. If u can help it would. be fantastic.