Unable to Establishing an anonymously accessible file share on Windows 2008 R2 (SP1)

So far I tried all this to no avail, server keeps prompting me for username/password when I try to access such share from non-domain Windows computer:

this is what i tried:

1.  Enable the guest account

2.  Add the everyone group to both the share and the security permissions.

3.  Open the Local Security Policy

4.  Network Access:  Let Everyone permissions apply to anonymous users = Enabled

5.  Network Access:  Named Pipes that can be accessed anonymously = (add) sharename

6.  Network Access:  Restrict anonymous access to Named Pipes and Shares = Disabled

7.  Network Access:  Shares that can be accessed anonymously = (add) sharename

am i missing something here?

Thanks

Guy