It seems that you are having some issues in order to set up your Slingbox PRO HD with the 2wire 2701 router.
The first point is to determine if the Slingbox shows solid lights. If not, make sure to check these links.
If the Slingbox shows solid lights, but you are not able to locate it on your network, check the security software running on your computer.
You can also try to reset the Slingbox. If you are able to locate the Slingbox, you will be able to run now the Setup Assistant for Internet Viewing. Check these links.