mounting remote system with write permission

[Scott S. Jones D.C.]

I am using samba and can access to read files on another system on my
small LAN. Yet I can't write to that partition. 

Here's the enter from /etc/fstab and /etc/mtab

fstab: 

//seth/c /mnt/sethc smbfs rw,user,noauto 0 0

(I just changed that in this session)

mtab:

//seth/c /mnt/sethc smbfs 0 0

I need to write from my linux system to that windows system. How do I do
it, and how do I get the changes to register, or do I need to restart
gnome to get them to register? 

Scott