Assassinate quest bugged (shadower)

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Assassinate:
To begin this quest this talk to your 3rd job instructor
Head over to the Perion Excavation Site and talk to Shane
Continue to talk to him to receive another quest. He will ask you to go to an arena. Talk to him again to enter.
Once inside, there are boxes you need to hit to warp to the next level. Only 1 person may enter the arena at a time, and you have 20 minutes to finish the quest.
source:http://ayumilovemaple.wordpress.com/2008/09/17/dummies-guide-to-thief-4th-job-skill-book-quest/
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this is how it suppose to work,however in virginSEA shane din tele me in to the area.

Ryuuma, ;D

I remember i tested it and it works.
Hmmm, i'll figure out whats wrong and get back to you (: .