Luminoth

Hey everyone, I was hoping I could get some help with a lacing problem I'm having with my Vans Hi-Standards. The inner laces on my right foot (my front foot and the smaller of my two feet) don't seem to want to lock down when they're tight. There's a lace lock on there and I've tried really jamming down on the mechanism inside of it to make it tight on the laces, but it never seems to want to stay that way. I haven't had any such problems with the lace lock on my left foot.

Is this something that's a known problem with these boots? It seems like kind of a cheap solution to the problem, maybe there's something I can hack together to help keep it locked down? I don't think it's a sizing issue, as I've got wide feet with fairly high insteps (cinching down on the shell laces is incredibly painful) and there's no heel slip at all on my left foot. Anyway, I appreciate any help I can get with this. I feel like I've been spending more time trying to get that thing tight than enjoying the spring snow.