Linksys router "Failed to resolve hostname"

The two DNS server addresses DNS1 and DNS2 on your router, 192.168.1.150 and 192.168.1.151, are bad addresses not responding to DNS lookups. Therefore remove these. These are causing your troubles with "Failed to resolve hostname". In case you got other DNS server IP addresses from Roadrunner, enter those now instead of these 192.168.1.x addresses.

"Just to be clear, I replace the 123.321.123.321 with my IP address right?"

Yes and no, not with the IP address assigned to you by your ISP, but with the primary DNS server IP address shown on your router, whatever this is. You apparently did it wrong again (DNS Server: unknown). Start over, you still have eight trials left. ;-)

Start over, you still have eight trials left. ;-)

Oh, no! I wasn't aware I was being monitored. :P

Anyway, hopefully I got it right this time (Used 192.168.1.1). It kept closing before I could read it, but I eventually got it down:

Server: UnKnown
Address: 192.168.1.1
Non-authoritative answer:

"t's giving me the error "Failed to resolve hostname" whenever it tries to connect to my account."

Most DDNS updaters in routers perform a DNS lookup against the hostname, i.e. your DynDNS hostname. If that fails the router may stop the update process at this point. Check that you correctly entered your full hostname, e.g. yourname.dyndns.org. Also check manually that the DNS servers configured in your router are able to resolve your hostname:

nslookup http://yourname.dyndns.org. 123.321.123.321

Where yourname.dyndns.org stand for your DynDNS hostname, and 123.321.123.321 stands for the primary DNS server IP address shown in your router.

You mean in my PC's command prompt? I ran that command and got a few time outs and then the prompt closed. I'm guessing that's not supposed to happen.