The B-52 SimOps page is on www.captainsim.com/products/x520/sops.html, not your system. The links should take you directly to the correct page (check the properties of the links).

Go to www.captainsim.com > Products > B52 Driver then click on the Sim Ops link near the bottom of the page. That should get you to the page where the link to the manuals are. If not, then something is preventing your computer from opening that page (maybe your Anti Virus software??).