Some burning software can have trouble with the wave files that aren't 44khz. You can try
1) Creating MP3 instead of wave with TextAloud and see if it works better
2) Use a different burning software, like Windows Media Player on XP, or Acoustica at
3) In TextAloud, if you change SAPI Version to SAPI5 Only under Options->Voice and File Options, then you can go to File Options and change the bitrate for wave files to be created, to something that your burning software will like better.