Yaris 60/40 seat stuck in up position

[palesheep]

I don't recall doing anything that might have harmed it, but the last time I put it up something must have slipped out of place because the 60 half of the 60/40 won't fold down anymore anymore. There does seem to be _some_ amount of tension in the lever, and i can hear a clicking when I move it, but it won't actually unlock. Anyone know an easy way to fix it, or am I better taking it to the dealership? (I'm still under warranty, but the nearest dealership is half an hour away and I'm not sure when I'll be able to get the time off work)