if you cannot move the gate then try teleporting. the same hing happened to me and i just
kept trying to move the gate and eventually it worked

which gate is it? try going at the front of the gate and check your magic meter when you
cast the spell if the purple meter is low the screen thing will happen. or you might need
to activate buttons or something.

and if you need any more help go to:
www.faqs.ign.com/articles/667/667825p1.html

talk to old one horn he will ask you turn some switches turn talk to old one horn again
the gate will open and he gives you a relic

talk to old one horn he will ask you turn some switches turn them
talk to old one horn again the gate will open and he gives you a relic

you need to be standing infront of the gate then use the move spell.