I am not able to extract any metadata from any of the database articles I am using - regardless of the database, no metadata is being caught. I am in a real quandry. Zotero is my academic right hand man! Yikes!
Are you having trouble only with gated resources that go through your proxy, or any page? E.g., do you get metadata from an Amazon product page? We're not able to test port-based proxies (which yours is), so it's possible those are broken in the latest connector versions.
http://ezproxy.sjcme.edu:2058/ehost/detail/detail?vid=0&sid=9d02e250-c931-438a-bd3e-1d4685b60319@sessionmgr102&bdata=JnNpdGU9ZWhvc3QtbGl2ZSZzY29wZT1zaXRl#AN=111298881&db=ccm