Workcentre 3315 no smb option

Hi

I would like to configure the scan to smb option on my qorkcentre 3315. I'm working through step two of this howto:

http://www.support.xerox.com/support/workcentre-3315-3325/support/enus.html?objGUID=7499

But on step 11 I have no smb section. I have only general, email and fax..