Help us help you. In other words, we need A LOT MORE INFORMATION! Start off by describing your LAN and it's configuration. Include such things as:
- The router's basic configuration
- Whether or not you are using NAT
- Whether or not you are using DHCP, and the address range for the DHCP or static addresses.
One thing to consider: This is all Networking 101. If you don't know the basics for getting a wired connection up and running, do you really want to run an distro such as Back|Track which is designed for advanced users? Might you be better off with a distro that is more "newbie friendly"?