I have heard of problems with certain receivers, Echostars and Manhatten, so I suggest you look for the latest file for Echostar receivers and try that. Which version of the T-Rex cam are you using? The T-Rex super 4.6 or an earlier model?
well good news chaps - i'm all sorted and got everything working at last - ditched the manhattan receiver (sold it on to a friend who only wanted the fta channels from 28.2e and got my self an echostar 2100va with twin ci - still got its sister modle receiver at my fathers in llanelli an echostar 1100va which i use to view fta from 28.2e)
echostar 2100 may be an old receiver - but since i been using it not had any problems regarding sound being out of sync with picture at all - one thing i was getting on my manhattan on the fta channels and on my previous receiver a hyundai
i am one happy chappy - thanks for all you advice and help over past few weeks chaps!