DTS not importing when converting MKV to MP4 using MkvToMp4 ..

Hi guys ... I have an MKV file which has a DTS audio track in it .. The MKV also has a 1280x720 video track, and an SRT subtitle track. I'm trying to convert this MKV to MP4 using MkvToMP4 0.223, but when the conversion is done, the resulting MP4 file does not have any audio track in it ..

If however I tell MkvToMP4 to convert DTS to AC3, then the AC3 track is present upon completion ..

Can I not have the original DTS track in the resulting MP4 file ?