[DCP-o-matic] no audio and only slow mo images after export

Hi, i exported one of my films and it came out with no audio at all and also the images were slowed down. i tried it afterwards with the Sintel Trailer, as suggested in the manual, but it turned out the same: no audio, slowmo pics. i tried vlc player and the Mplayer. i noticed that in the audio-menue in DCP-o-matic it tells me on the left corner "Audio will not be resampled" What should i do to make that right??????? Thanks