Hi guys, I bought a cable midi2usb alesis to add *.sty file to my synth yamaha psr a300 i used musicsoft ddownload for yamaha i cant access to the flash memory i can delete i can copy file but when i send file*.sty to the synth an erro message appear opration canceled...i used the cable without installing driver because i loste the driver cd...can some one help guys thnkx