Are all required driver files installed correctly?
Is the WIBU-BOX attached to the proper port?
Does the computer recognize the ports and their I/O addresses correctly?
Are you using a special kind of computer or special kind of motherboard?
Is a printer attached to the same port as the WIBU-BOX?
Does the system correctly recognize the WIBU-BOX/U?
Diagnosis possibilities of the WIBU-KEY driver
Activation of the LPT-Port (Linux)