What's most likely happening is that your laptop probably is not getting an IP address because DHCP is not working, or else it's not getting through the wireless security so it can get the DHCP.
Make sure in your wireless network connection TCP/IP settings you have "obtain automatically" checked for both IP Address and DNS. (And Gateway in the Advanced section.) Make sure that the router has "DHCP" (on the LAN side, not the WAN side) enabled; this is what gives the automatic IP address/DNS to the laptop.
Also, make sure you have wireless security (WEP) DISABLED on both the router and the laptop; this is the easiest. If you want to have wireless security, make sure you have it enabled in both the laptop and router and make sure the keys are set to the same thing.
If neither of those things help, please answer a few questions:
1. Is your router a wireless router or do you have a separate Router and separate Wireless Access Point?
2. What is the brand and model of your Router (and Wireless Access Point if separate)?
3. What OS is on your laptop?
4. Assuming you have XP, go to your "Network Connections" control panel and double-click your "Wireless Network Connection". Then click on the "Support" tab, and click on the "Details" button in the support tab page. Copy and paste that info into your reply post to this thread. It'll look something like this:
Physical Address: 00-12-F0-CD-A7-6B
IP Address: 192.168.1.127
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DNS Servers: 192.168.1.2, 192.168.1.3
WINS Server:
5. What are your router's WAN and LAN settings (IP addresses, gateway, any other settings you can find)?
6. Is DHCP enabled in your router?
7. Is your router set to "router" or "gateway" mode? (If you can't find these modes in your router, then if you supply the brand and model of your router, I can ask this question more specifically and tell you where to look).
8. Why did it take you 2 days to set up your router, and how did you know it was working after that effort? Please supply as much detail as you can.
With this info, either myself or someone else will be better able to help you.
- The Inspector