Just purchased the CS 767-300ER (GE) from MSFS2024 Marketplace.  I cannot get full avionics in the airplane - including engine performance gauges and information.  Nothing happens when I select the Engine Status buttons  and computer select switch and nothing happens.  The switches do not work and no performance gauges or data appear in the Engine Display or EICAS.  Is this product not compatible  or is there a fix or workaround somewhere.  Airplane unflyable at this point.  Flying blind.   Cant seem to supply screen shot to illustrate.  Need assistance please & thanks.