The link works just fine, if you are having issues it is settings on your end. Worse comes to worst I could Email it to you if you PM me your Email address.
OK - eating a chunk of humble pie here. This afternoon I tried from my corporate network and downloaded the docs I wanted, using Firefox on PC. Now back at home (using OSX 10.4 and 10.5). Tried Firefox (same version as PCone), Camino, OmniWeb & Opera - all the same result. I guess in some way it is to do with sending referer (as the behaviour is the same as if one pastes the link URL into a fresh browser tab on PC). Darned if I know what's blocking it though, as I haven't set anything to do so. I'm on ADSL using a sitecom modem/router with firewall.
Have to say I've not experienced this problem before, so any suggestions welcome. Later I'll try the links through Windows in VMWare - just to test if it's anything to do with my modem/router.
Also, I noted that the manual doesn't cover the AFP service - is there an updated man?