I have an N1200, up and running for the best part, I only can't seem to map a folder in xp. it keeps asking for name and password, and it won't take my created names an or passwords. I turned down my own firewalls, but that didn't have any success. I have my N1200 on a switch to the router and my computer, could the firewall in the router cause the problem? or am I missing something else?