Insert brain...oh wait it's 4:30am it's missing...

I just realised 4:30am makes me dumb.....I was trying to share my mac dvd drive with windows via smb..set all the permissions up etc...couldn't get in...oh look disable and enable my macs firewall...it works...>.> took half an hour to work that out, even geeks get stumepd by the obvious somtimes!