False promise=
megafont is a false promise?  ? Oh nooooo !
Warning, megafont beginner friends...... The last year you tried megafont and failed. Why to fail again? If you create a chaos with a lot of test mappings, lost and despaired to hear megafont, you certainly have created conflicting mappings (and INS files in Cake) confusing one to other and you damned Registry! (Megafont extensively uses Registry, and you know how sensitive the Registry is).   If you can't hear anything in your sequencer (nor hear wrong instruments) delete all wrong mappings in Megafont Manager. Maybe then megafont will run firmly. (If not, reinstal Windows, as says LasT NighT= "if you make a mess with Registry, easily it will drive you to reinstal Windows").