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.