wildcats198308
Not the browser you use, but the DNS settings for your computer's network adapter. Some people change their DNS settings from the default setting of obtaining the DNS server address automatically, which ends up using Hughesnet's DNS server, to manually setting it to Google's or someone else's.
If you didn't manually change your DNS settings in your adapter, then it's probably using Hughesnet's, and if it is, I don't know why using the www.systemcontrolcenter.com address won't work for you. I'm sure the more adept people like Corrosive, BirdDog and Gwalk may have an idea as to why using that URL for the System Control Center isn't working.
But, with that said, at least you can still get to the SCC using its IP address.