Surround with encoding to Dolby and DTS

Dear Freinds , as wavelab now can replace the audible material for the video , and to use it for mastering the video track , now i have succeeded to produce a 5.1 audio for video track and it is readable by adobe premier pro , but i got a strange out as adobe encoded the file into 2 separated audio , first a mono track without video and at its end i got the video with the 5.1 audio
this video file is not playing the 5.1 on my AVR , the only device i have that can play surround file i only got stereo track , can anybody suggest how to encode this file in Dolby surround 5.1 or DTS ??
thank you all