Aligning the Inertial Navigation System in the CLS 747

Okay, maybe I'm missing something here, but I've been trying to get the INS to work in the CLS 747 with no success. It's not helped by the fact that the manual which comes with it is actually for a DC-10 rather than a 747, but since (at least as far as I know) they both had the Delco INS it should be more or less the same procedure. I'm reasonably familiar with the INS on the older 747s, but this one refuses to work.I downloaded the more recent tutorial for the CLS 747 (which does have a bit about the 747 INS), but no matter what I try the alignment procedure will not commence, so I'm wondering if anybody has actually followed either of these guides with any success, or if it is bugged. I've tried it in both FS9 and FSX, but to no avail.Al