Hi Kenneth,
unfortunately I don't have a
cableone.net account to test this with and I suspect it will be hard to figure this out just from asking questions. Could you enable calendar.debug.log and calendar.debug.log.verbose in the advanced config editor (Options > Advanced > General > Config Editor) and check the logs in the error console (Tools > Error Console) for what is happening when you do this?
I doubt it, but if there is a slim chance that you would be willing to give me access to your cableone account by sending me a password I can log in with, please contact me via private email. Be sure to encrypt the password, for example by sending it via gpg / enigmail. My keys are on the public keyserver.
Philipp