[maxmsp] Aiff to Wave file conversion problem

I have recorded some music in surround sound using MaxMSP on an Apple Mac.  I am converting the program I am running to PC format.  I have converted the surround sound aiff file to a wave file in order for the PC to understand it.  To do this I simply re-recorded the aiff from an sfplay~ object into an sfrecord~ object.  The resulting file works fine on the Apple Mac but the PC doesn't recognise it.  The PC does recognise a stereo version but not the surround sound version.  Why doesn't the PC recognise the wave file?  ...what can I do to overcome this problem?
 
 Furthermore, the PC has recognised a brief surround sound test file (wave) I created whereby I recorded four separate distinguishable sounds into the four respective channels using four separate sfplay~ objects into one sfrecord~ object.  For some strange reason the Pc recognised this file and played it back as expected in surround sound.  The assumption I draw from this is that sfrecord~ seems capable of saving a surround sound file in wave format but only if the channels are recorded from separate sfplay objects.  For some reason sfrecord~ does not like converting an existing surround sound file from aiff to wave.  Do you know why this might be? 
Would the problem lie inside the sfrecord~ object?
 
I'd appreciate it if anybody can solve this problem as it's quite urgent that I can convert from aiff to wave in order for a PC to play the file back in surround sound.  

Thanks.