Also, when I went to t35.com directly instead of thru cPanel Login link, I plugged in the info and submitted. I got "document contains no data" error.

I rebooted firefox twice. I shall try again using IE which we all know has its own major problems.
IE says that server not found. So, the problem is most likely not the browser??? I don't trust anything IE, so I take this with a grain of salt.