D-Link DW-290 User Manual - page 109
2. If the network requires WEP, then the “Data encryption (WEP enabled)”
check box is selected by default in Wireless Network Properties. Select
the “The key is provided for me automatically” check box if the WEP key
is automatically provided for you. The driver will then use the Default
Encryption key from the current D-Link NCP configuration profile
irrespective of the network name. You may choose to enter the WEP key
by clearing this check box and manually entering the network key and
key length. Note that the key format must be hexadecimal digits and the
key length is limited to 104-bit in Windows XP, as opposed to 128-bit key
supported by D-Link NDIS driver in the NCP configuration interface. If the
network that you are connecting to requires 128-bit WEP key, then it is
recommended that you disable Windows XP automatic wireless network
configuration and use D-Link NCP configuration instead.