Mounting SMBFS Shares

[complete-noobie]

I just installed FC5 and now I'm trying to mount my samba shares from another computer. In my fstab, I typed

//192.168.1.10/Backup /mnt/Fileserver/Backup smbfs credentials=/etc/credentials 0 0

This worked on my computer when I was using FC4 but not now. In the terminal, I typed "mount -a" and it said:
"mount: unknown filesystem type 'smbfs'"

I later changed "smbfs" to "auto" and it still complained saying:
"mount: special device //192.168.1.10/Backup does not exist"
I also double checked to make sure that that information was correct and it was. I also tried replacing the IP address with the computer name "//fileserver" and I got the same error. Any Ideas?

[PilotJLR]

Try changing the "smbfs" or "auto" to read "cifs" instead.

I'm fairly sure FC5 did away with SMB entirely, in favor of using CIFS, which modern versions of Windows use.