well originally I was gonna blame the DK for not attacking your target but then I kept reading lol :P
first off (and this has more to do with survival than threat) your blue and yellow sockets are fine but I would suggest changing the reds to parry/mastery as well as reforging your gear for mastery > parry >= dodge
back OT: your glyphs are fine (though I would use heroic throw over the tclap one) but your spec needs some work if you want more threat. heres my warrior:
http://us.battle.net/wow/en/characte...talent/primary
a combination of deep wounds (of which I only have 2 points in) and war academy should help generate sufficient threat unless you have crazy (and/or overgeared) dps
before I go into priority, are you having problems on AoE or bosses? or both?