[newbie] permissions on the network

[Heather Reed]

OK - coming thick and fast now! I have Samba running, and can see the linux box from windows. However, I can't access it, as it gives me the message 'your account is not authorised to log in from this station'. I am following a tutorial in which I have created a public directory that should be accessible as guest. However, I can't get as far as that, as I am being told I do not have the necessary permissions to access the linux computer - this is from windows XP. How do I give myself permission? Thanks Heather