bendigo

hello, i want to merge two files together and convert this file to .wav. In the WavePad I can play it, but when i save the file as .wav i can´t listend it on my computer. what´s wrong? (i try it also to save it to mp3 and after that convert it with switch sound file to a .wav file --> the same error, i can´t hear it on my computer -> other files with wave are running without any problems) greetings pascal