Website repeatedly "loads" and will not stay open when trying to look at a score

Whenever I click on any sheet music on the website, it simply continues to refresh, and eventually stops. At this point, the screen turns grey and says "A problem occurred with_____________." The blank being the link to whatever score I was trying to open.

I do not have pop-up blockers on, and I have flash enabled. Has this ever happened to anyone? I have a newer mac, and whenever I try to open it on my wife's computer (older mac..about 3-4 years) this does NOT happen. So, it must have something to do with my computer.