Hi,
Can you please give more details ? :
Do you already have shared files, directories and printers between two windows computers ?
Can you handle it without the WL-500g ?
If you browse the network neighbourhood can you see the other computers ?
What OS is on each computer ? do you have XP SP2 everywhere or some Win 98 , XP SP1 or Linux/samba somewhere ?
Did you installed some fire-walls on your computers ? Do they allow you to browse and share ?
There may be a lot of reasons for this to be not working, but I don't think the WL-500 may be involved for wireless or ethernet (LAN) connected PCs, it is acting as a switch (or a hub if you'd rather). This means that it does nothing more that passing the dishes ;-) no filtering, no translation, not interacting.
Seb
ADSL Access with Alcatel speedtouch 536 bridged ethernet modem.
ASUS WL-500g Deluxe, with Oleg 1.9.2.7-6b firmware.