Ja, my roms are .bin files (non compressed) and it still doesn't work.  Launcbox imported them fine, but when I click to play nothing happens.  I have games for other systems that work fine, it's just the psx ones that do this.  Please help.  Thanks.
 
	RetroArch 1.7.4 (set to use mednafen_psx_libretro core) - Windows 10 Pro - Launchbox 8.7 (paid version) - i7 3930k, 16gb ram, gtx titan, asrock x79 extreme4