IP Networking

I have a desk top PC, DSL modem, HP C5180 All-in-One, F5d7230-4 router and a second desk top PC with a wireless card. These all work together fine. I bought an Asus EeePC with Linux as the operating system. I can take the EeePC to a coffee shop or city library and log onto the net with no problems. When I try to log onto the WiFi in my home the Linux system on my EeePC sees the router but will not establish a connection. The same thing happened when I visited my son and tried to log onto his wireless net. We both use the same router (Belkin F5D7230-4). I can log onto the net if I use the eithernet cable between the router and the EeePC. I am not using any encryption. Does anyone have any Ideas and has anyone had similar problems.
Thanks royace

So the PC to the wireless router works fine, correct?

What Operating System (Windows XP, Ubuntu, Asus Linux, etc) is the EeePC using? The Desktop?

In the Belkin English user manual, there is a section on Restoring Factory Default Settings. Have you tried this?

From both the PC or the EeePc, can you "ping 192.168.2.1"?

Have you checked out the eee pc forums? This thread might be of interest to you.

I noticed that the MAC addresses of other devices on my home network was listed in the set up of the Belkin router. I added the MAC address of the ASUS EeePC900A and the problem was solved. I can now send data between my home network and the Laptop. I did not think I had to do this because anyone can bring a laptop which has Windows on it and sign into my home network without me having to add their MAC address to the router set up. Thanks to all who responded with ideas. The problem is solved. I am surprised that Belkin tecchnical help did not relay that bit of information to me.