After talking to me Kodlak says "it's his heart that matters" then Vilkas says "and his arm".
From this point Kodlak should tell Vilkas to test my arm, but he doesn't. Kodlak just stands up and stares at me and says and does nothing.
I if click on him the screen says "this person is busy" and nothing happens. Kodlak just stands there staring at me.
I can't even find the scene or stage number to force it to continue.
Any one have any ideas?

...or leave, do some other unrelated quests and come back.