If the firmware is the ends with 04401 it cannot scan with any settings via smb to server 2008 or Win7. It would need to be upgraded to be able to do so. Just grab the appropriate update off xerox.com and it will just work assuming the settings are correct.
Also note, Connectkey does not have Microsoft Networking so you need to smb scan via IP address, not Host name unless you are on, and the device is part of a domain. Also, the SMB port should be 445 and not 139.
If when you go into the device and setup a repository, the default port is 139 when you choose SMB in the dropdown, your firmware needs to be updated.