Hi Badass.
You say.
"the screen became diluted", I'm sorry I don't understand what you mean by this.
Can you explain for us, thanks.

What happened when you phoned your ISP Cox ?

Last point you really should Port forward your router, they give step by step instructions.

Try switching to Manual Port forward using port numbers between 45000 To 65000
Both Manual Port forward No, & listening port should be set at the same number
In LimeWire, GO to Tools/Options/Advanced/Firewall Config & use Manual Port forward.

Then Port forward your router,

Port Forwarding for the Linksys WRT54G
Follow this link it will open on the page you need to PortForward your router.
Use this blue link. & don't forget to create a static IP first, as instructed , & click apply after changing each setting.
PortForward.com - Free Help Setting up Your Router or Firewall

If you need help, Shout, If it fixed your problem or not, Feedback helps others.
Peace

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mickjapa108