I am having the same problem but I have WINDOWS 98 se.
I have gone round and round with this. I replaced knoppix with 98 and then went back because 98 I had to find all kinds of Drivers that were not on the disk. I can see the Windows drives on KNOPPIX but not the knoppix on Windows here my setup.
[global]
workgroup = MYGROUP
netbios name = MYcomp
security = share
[data]
comment = Data
path = /home/jrichards
force user = jrichards
force group = user
read only = no
guest ok = yes

I Have been working on this for weeks Help