Thanks for your comments Don. I knew what I had done wrong. However I thought that SIA would be cleaver enough to allow me to recover my mistake by allowing me to load multiple files. I managed to get over the problem by editing the individual song with SIA and then burning the CD with Windows Media...

Unfortunately, I deleted the tempory files after burning a CD and now I want to re edit the file. I have the .wav files but it seems that it is not possible to load more than one file.
Is there a solution to this problem?