Help me with FF12(PS 2)!Please!!!

[alt_arip]

i need help to get to Giruvegan.There a gate(GIGAS GATES) that in my way.the discription on the gate says that "beyond the gate lies sacred land(GIRUVEGAN) and over the gate the gigas holds sway"i REALLY dont understand what it means.please help me anyone!!!!You guys can e-mail me at alt_arip@yahoo.com or you can just reply me here.

[SephirothsCloud]

Well no one every replied to this, and you probably wont read it, but in case anyone else needs to know ill go ahead and post how to fix the problem.

Have someone summon Belias and open the door using him.