Stuck in Asguaard castle

[SuzyQT333]

Okay, I know when someone tells me I will probably feel dumb, but I seriously cannot find the last switch in Asguaard Castle (I hope it is the last) to remove the spikes down the narrow corridor with skulls on the other side. I found three switches so far and none of them work those spikes. Any one know where another switch is?

[lppedersen]

Im not sure if im right, but i think its where you have to find a way north from there. Go to where you came to this area from the right, and go north.