Tiger, follow these instructions:
1. Start>Programs>Accessories>Command Prompt
2. Type in: ipconfig
3. Press Enter to run the command.
4. Look for the IP address listed next to, "Default Gateway." (Example: 192.169.1.2)
5. Open your Internet Browser and type that same address into your address bar. DO NOT add www. or .com.
6. Press Enter to visit the website. A new screen should appear which is the control panel of your router / DSL Modem.
7. At this point you might have to enter a user-name or password. If you don't know it, google your router's / DSL Modem's model name/number adding, "default password" to the end. For example, "linksys wrt54g default password." This should give you some results detailing the default login username and password to give you a shot at logging in. If the default username and password method doesn't work, you will have to call the tech-support team of the company that makes your router/DSL modem asking them how to, "reset the login username and password."
8. After logging in, look for a section that hints anything of the following:
Firewall
Applications
Virtual Hosts
Port Forwarding
9. Once you find it, look for a region where you can enter information similar to this:
10. After setting up port-forwarding to forward ports 2000-6000 on UDP & TCP set up the application to forward the ports to your computer or your computer's IP Address. (This address is listed in the command prompt window we used to get the IP Address for your router's control panel. Just look at the same window for the IP address listed next to, "IP Address.")
Now you should have ports 2000-6000 heading toward your computer on both UDP & TCP.
If you need more assistance on this matter, feel free to ask. That was a bare tutorial and I'll be willing to go into further detail to help you forward the ports. Feel free to PM me about it if you wish.