.Delete file: C:\Program Files\Sibelius Software\Sibelius 5\portaudio_x86.dll (or C:\Program Files (x86)\Sibelius Software\Sibelius 5\portaudio_x86.dll if it's 64 bit Windows version). .Download file http://www.sibelius.com/download/software/win/portaudio_x86.zip , extract from it portaudio_x86.dll , and copy this file to: C:\Program Files\Sibelius Software\Sibelius 5\ (or C:\Program Files (x86)\Sibelius Software\Sibelius 5\) .Reboot and start Sibelius again. Dan -----Original Message----- From: sib-access-bounce@xxxxxxxxxxxxx [mailto:sib-access-bounce@xxxxxxxxxxxxx] On Behalf Of Haipeng Hu Sent: 27 September 2013 01:04 To: sib-access Subject: [sib-access] Re: Compatibility problem Thank you, but it doesn't work. I don't know if there're some settings wrong in my system. If you wish to unsubscribe, send a blank message with the single word, unsubscribe - in the Subject line to: sib-access-request@xxxxxxxxxxxxx If you wish to unsubscribe, send a blank message with the single word, unsubscribe - in the Subject line to: sib-access-request@xxxxxxxxxxxxx