there are several english audios that your dvd would most likely have. It might have DTS, and if you only kept that one your DVD player or reciever might not be able to decode DTS.
Rescan the movie and post here which audio's the movie shows up. (it could have english 5.1, english 2.1, ect.)- if you keep the english 5.1 the movie should run with audio just fine.