The MAX1464 cannot be found by the PC. There are many possibilities, including:
1) The setup is not correct. Verify that the setup and connections are consistent with that given in the MAX1464 EV kit data sheet. Also make sure the supply voltage is correct and that it is applied on the correct terminal block on the evaluation board.
2) The jumpers on the evaluation board are not properly set. Verify that the jumpers are consistent with specifications in the MAX1464 EV kit data sheet.
3) The MAX1464KEY, the jumper setting, and the configuration settings are not consistent for 3-wire or 4-wire communication.
4) The computer parallel port has a problem.
5) The evaluation board is damaged. Visually check the evaluation board and make sure there are no broken or missing components. 100% of all evaluation boards are tested before they leave the factory floor.
6) The MAX1464 chip on the evaluation board is damaged. Replace the MAX1464 ASIC.
7) The MAX1464KEY is damaged.