I've been trying to help people on Dark Souls 2 with the Iron King boss, but every time I get summoned, when the summoning player enters the mist I immediately get sent back to my world.
Is Iron King a solo-only fight? For what it's worth, I only used the Small White Sign Soapstone so I can get Smooth & Silky Stones. I am level 125, with Soul Memory of 1,984,871, and am playing on NG.