Your original message listed all the components you installed, including class driver, IVI engine and VISA. For a driver to show up in MAX, you need to install an IVI specific driver (specific to the instrument you want to communicate with). A class driver cannot be used without the underlying IVI specific driver. You can download IVI specific drivers from the Instrument Driver Network (ni.com/idnet).
Also, you will also need the underlying I/O driver, such as NI-488 if you are communicating over GPIB. You do not need to install an I/O driver if you plan on communicating over the serial bus, USB bus, or ethernet.