D-Link DW-290 User Manual - page 111

2.  In Wireless Network Properties, the “This is a computer-to-computer (ad 

hoc) network; wireless access points are not used” check box is selected 

by default. You may choose to enable WEP by selecting the “Data 

encryption (WEP enabled)” check box and the “Network Authentication 

(Shared mode)” check box. Select the “The key is provided for me 

automatically” check box if the shared 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 shared key by clearing this check box and 

enter the key and key length manually. 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.