Have you set up file sharing? This would allow the one machine to access the other via a password. Right click on the folder that you wish to share and select "Sharing and security..." This should get you started.
client comp isn't firewalled at all. I've tried disabling the host firewall and restarting without it, behavior is exactly the same. I have my CLIENT ip set in my firewall to allow any access between the two.I would disable all of the firewalls to see if they are causing a problem...