I've setup an internal FTP server on our network at work. I tested it internally and it worked fine. Then I created a sub domain with our hosting commpany and forwarded the public IP to the server through our Cisco 2801 with NAT. I can login to it from outside our network with a command prompt but not with windows explorer for some reason. Any ideas as to why that would be? I've opened ports 20 and 21 on the 2801.