Key settings
The WEP Encryption type of station has to equal to the access point.
Check 'ASCII'
field for characters WEP key or
uncheck 'ASCII'
field for Hexadecimal digits WEP key.
Hexadecimal digits don't need to preceded by '0x'.
For example,
64-bits with characters WEP key :
Key1= loads
Key2= oueww
Key3= wopek
Key4= woppe
64-bits with hexadecimal digits WEP key :
Key1= 123456789A
Key2= 23456789AB
Key3= 3456789ABC
Key4= 456789ABCD