Today, I tried to set up the port range forwarding.
I went into the Wireless G-Band Router page and changed the port to 5001 as instructed on this page: http://www.slingmedia.com/get/KB-005033.html
After that, the internet viewing set-up said it was successful but I still get no video signal. I just get a small fuzzy green horizontal bar.
What am I doing incorrectly?
You just need to check the network connections. This is how you must connect the network components.
1. Slingbox to router using an ethernet cable
2. Composite cables from Cox set top box Composite outputs into the Slingbox Composite inputs.
3. If you want to set a passthrough, Composite cables from Slingbox outputs into TV set Composite inputs
The following link will provide you with further information.
If you hook it up this way, you will be able to get your Slingbox working in a proper way. Finally, if by any chance you are using the HDMI cable, you will need to remove it, since the Slingbox and the HDMI cable are not compatible at all.