lvl44 main storyline bug! help!

server: balmung
quest:
Lv. 44 Getting Even with Garlemald
Main Scenario Quest
Quest
Patch 2.0


Rewards
Experience Gil
12,190 475

Description
Glaumunt would like to aid in your mission to rescue the captured Scions.
Objectives
Investigate the drainage pipe.
Enter the drainage pipe.
Speak with Alphinaud.
Speak with Cid.

After me put down all four chigoes that from the drainage pipe, I clicked the pipe but it didn't work. I have tried everything even emotion, and i think it must be a bug.
pls fix it immediately!:mad: