Sure John, I can give you some advice in this.
Your ZD1100 as i think an older firmware version on it.
The latest versions of chrome, firefox and IE are blocking certain unsafe SSL versions.
What i normally suggest customers is to use Firefox for this as you can change the config of firefox to allow access.
check
https://support.mozilla.org/en-US/que...
I do suggest urgently that you upgrade the ZD1100 to a more recent version so the latest SSL is supported.
Kind regards
Martin