only getting back mono after recording

Hi I'm recording a wave file from the web and playing my guitar. when doing so I see and hear 2 signals while playing both files but when I play back the recording it plays back Mono only out of one of my speakers? once again I hear them in stereo and see the wave file in sonar with 2 signals L/r but plays back mono? any help with this is greatly appreciated.
 
jamit_a
 
Marcello