PLANET WNAP-3000PE - Manual (Page 69)

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8.7 Using 802.1x Mode (without WPA)
The procedures are similar to using WPA-802.1x.
The only difference is that on your client, you must NOT enable the setting: The key is
provided for me automatically.
Instead, you must enter the WEP key manually, ensuring it matches the WEP key
used on the Access Point.
Note:
On some systems, the "64 bit" WEP key is shown as "40 bit" and the "128 bit" WEP
key is shown as "104 bit". This difference arises because the key input by the user is
24 bits less than the key size used for encryption.