Leverage browser caching issue?

Dear sir

Thanks for your excellent plugin.

i tried proxy option in order to eliminate Leverage browser caching, it works fine and did not show up on google test page, but the issue that it is gone as well fromn my site.

what i did ?

1. enabled proxy script

2. i added the below URLS to Proxy Preload List

m.addthisedge.com\/live\/boost\/ra-5872097d137f9e9c\/_ate.track.config_resp
s7.addthis.com\/js\/300\/addthis_widget.js
s7.addthis.com\/js\/300\/addthis_widget.js?ver=4.9.4
google-analytics.com\/analytics.js

………….

am i doing anything wrong?

please let me know

Thanks
Jone