How To Get WINDOWS WEP PASSWORDS To Work

Having problems getting simple simple simple WEP to work with your Airport despite knowing exactly what you are doing with WEP, everything looking fine, and with a network that otherwise has always worked fine before? Might be the case of password used on your clients.
Having set up a few Airports with mixed Windows/Mac clients over the last few years and finally discovering the "0x" prefix double-secret answer, I was trying that at first. But the new Admin client WON'T LET YOU USE THAT or "$" ANYMORE (take note helpful posters who keep giving that as the answer - it DOESN'T WORK ANYMORE). The new Admin client helpfully allows your password to be selected as "hex" now, but restricts it to 10 chars for 40-bit WEP so you get an error with either of those prefixes.
But that's OK because the WEP entry system does work and if you select "Equivalent Network Password" in the Admin client, it will show you the password as you entered it so you can confirm.
HERE however is the trick. The Airport, unlike any other router I've config'd, seems to be fussy about case. Go figure - for hexadecimal, case should not matter, the characters are really 'numbers' so A=10 and B=11 and it should be that a=10 and b=11 as well.
But not for the Airport which is happy getting "0AEB66A88D" but won't authenticate clients which are config'd for "0aeb66a88d". Seems very bizarre as I would have bet my Honore Balzac that the WEP would have been sent in binary at some lower protocol level, but apparently it's sent as a character string. Certainly I have entered WEP keys both ways before into other devices with no problems. Naturally good coders would always convert the case either before sending it and/or upon receipt, but in this case we apparently have lazy coders on both sides - Microslug doesn't 'toupper()' as it sends the string and Apple doesn't 'toupper()' as it receives it...
First a recommendation: get the Airport hardwired to your network temporarily so that as you config you are doing it over an Ethernet cable. This way you can test settings, then still config the Airport without resetting the unit back to "Factory Fresh" every time.
Second the ridiculous WEP answer: Configure the Airport as you think it should be. Then adjust the WEP passwords on client PC's and other devices so that all Hex codes are entered with caps. Voila everything works fine. A bit tedious to have to re-enter the password on every PC or device if you have a few, but better than it not working at all...
Third: It seems to work better on the Windows side if your network is configured as "OPEN" rather than "SHARED" WEP security. This means the router won't request the password, but I'm not sure how much difference that really makes to the client as it should send the WEP key either way...

Welcome platevoltage,
this could help you...
http://docs.info.apple.com/article.html?artnum=166611
http://docs.info.apple.com/article.html?artnum=108058

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****Please mark Accept As Solution if it solves your problem****
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