All bugs need to be reported on the AB40k.org bug tracker:
http://www.ab40k.org/tracker.php?p=27
If the bug isn't posted there, then it's likely to go unfixed.
I haven't got access to the files to check here at work, but there are two things to check regarding this: (1) that the Imperial Armour option has been ticked in the roster rules, and (2) that the Ram final rules in IA Vol 11 and IAA 2nd Edition still allow Space Wolves to take them (I don't have access to the FW books here at work either to check). If the final rules (not the experimental PDF!) allow it to be used, and you have Imperial Armour ticked, then post a report in the bug tracker so it can be fixed.