Hate to suggest the usual easy fix-it, but have you tried with a different browser?
That swirling whirly very much resembles a problem I had when working on the PRONI (Northern Ireland) records a few days ago. Some setting in Firefox would not let me in - it was blocking a pop-up, but not showing an option to allow the pop-up. I switched to IE and was able to search in PRONI without a problem.
I was finally able to access the PRONI records in Firefox by doing a right-click/reload, which then gave me the "allow pop-up" banner. Extra work to use Firefox for those records until I can figure out which add-on is causing the problem, but at least I verified the issue.