I have three computers on a home network. The number one computer is cabled to the wireless router, while the other two have wireless connections. The number one system runs XP Home, the number 2 runs XP Pro, while the number 3 runs W2k.

I cannot get the number 2 computer to see the other two (or vice versa). The other two are working fine. The number 2 can see the wireless network. Also, when I turn off WEP, all three systems see each other, but that would be a totally unsecure system. I have tried a few things with the number 2 system, such as adding SP2 which improves networking, re-installing various things, etc. The workgroup name appears to be identical for all three systems, and again, all is well without WEP. The WEP key is the same for all three with this odd exception: When I type in the key, it is all accepted, but when the textbox loses focus, the key is truncated. I assume this is a security feature such that the length of the key does not remain visible (the characters are not visible).

It is possible that the hardware is damaged, as there is some visible damage to the antenna of the access point, but that doesn't seem likely, since turning WEP off (on all three systems) allows the computer to connect.

Does anybody have any suggestion as to what I should try next?