I cannot seem to access any weblink from within a document I have saved in my Zotero file store (i.e., zotero://attachment/[my doc]).

I have gone through this a number of times, and the sequence is -

when I click on the weblink from within the saved document, the first error that appears is "Zotero detected that you are accessing this website through a proxy. Would you like to automatically redirect future requests to s-static.ack.fbcdn.net through [my university extranet]?" -

then the only option I have is press the button "Enable (U)...". The window is displayed that reads "Only add proxies linked from your library...." -

when I press the button "Add Proxy" - a blank page is displayed -
equally, when I press the other button on that screen, "Ignore" - also, a blank page is displayed.

When I go through this sequence and log on to my extranet again (this has happened several times), and subsequently trying to open the weblink again from within the saved document, I again see a blank page, this time with the message "Zotero automatically redirects your request to s-static.ac fbcdn.net through the proxy at [my extranet]. -

clicking the only option button available, i.e. "Proxy Settings (U)", brings up the window "Proxies" -

On that window, I have enabled proxy redirection, and 'automatically recognise proxied resources'. I can only click 'OK', but the blank page is still displayed.

How can I view these linked webpages?

Thanks for your help.