Hello Jeongho,
I see no one has responded to this post yet. So, at this point I would recommend contacting your local Xerox Support Department to speak with a Product Specialist for more assistance. You can visit our Contact Us page for support options in you location: https://www.xerox.com/en-us/about/contact-us Scroll down to the Worldwide Contacts and select your Country.
Thanks,
CathyO-Xerox
Community Manager
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