Help me please i got this error

SLAM wont work and I keep getting this error --------------------15-5-2016 22:54:19-------------------- System.FormatException: Invalid WAV file - No fmt chunk found bij NAudio.FileFormats.Wav.WaveFileChunkReader.ReadWaveHeader(Stream stream) bij NAudio.Wave.WaveFileReader..ctor(Stream inputStream) I hear myself but and i dont hear the music bij NAudio.Wave.WaveFileReader..ctor(String waveFile) bij SLAM.Form1.LoadTrack(SourceGame Game, Int32 index, String SteamappsPath)