Connection problems

in bit torrent, it says I have an NAT error when I’m downloading. I’m using Azureus as my client, and the config wizard says i have an NAT error when i try to connect. Some downloads go normal speed but most hang out around the 1-10 kbps range. I have no router and am using the default windows firewall.

any help would be great

btw it doesn’t upload anything either. :puzzled: