Solution:
1. After creating your publication on the management studio, add the user IUSR_
Important: you don't have to create that user, this user already exist, so look it up under advanced search!!
2. Rightclick on that user and choose properties.
3. Under usermappings check the box of the database you would like to access, then click ok.
4. Rightclick on your publication and choose properties.
5. Select publication access list an add the
6. Rightclick on your publication, select view snapshot status and generate the snapshot.
7. Execute the web synchronisation wizard the subscription wizard.
this wizard creates the virtual directory for the webaccess, choose annonymous access.
8. Execute the subscription wizard and use windowsauthentication.
Reference: