Ubuntu Networking :: Samba Error In Nautilus Ver 9.10

I am running Ubuntu 9.10. I am trying to make a folder shareable so a windows XP computer can have both read and write access to the folder. I am using Nautilus to configure access and I get the error:

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This is the screen before selecting read/write access Prop1.png

This is the screen after unsuccessfully selecting read/write access. Prop2.png

I have attempted this before using this facility and I do have read access to the folder using the windows computer. But I need read/write access.

I've tried to RTFM and look through the forums. The samba service is running:

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At the command line Samba's testparm command kicked out many errors. This is puzzling because I did not edit the smb.conf file, Nautilus did. The parameters that testparm complains about appear to have correct syntax according to the Samba Team Website .

I also went into the Synaptic package manager and tried to re-install Samba with no effect. I would install the 10.04 LTS version but I've heard that has problems too.

Is this a permissions issue? The user I am logged onto has "permission to configure the system" checked under system-->administration-->users and groups.