This is a known issue that caused many problems for users working with MP3. I recommend using an alternative, or at least, upgrade the version of CyberLink WaveEditor to the latest version. If after upgrade, you have the same issues, then download an alternative. Audacity might come in need because it's free, I have used it and it works without errors. The latest version should be compatible with all the operating systems. Make sure to download the LAME codec to have support for MP3 files, as well.