I got the home theater in a box yesterday and since then i couldnt get the surround sound to work. the system has A B speaker switching the A sets the 5.1 and the B sets the 2 channels but only the front and left main speakers are on . I know the rest of the channels work because i heard a hiss from each of them when i messed with the audio set up for (db) I dont know what to do and i really need help .. help now i want to enjoy the 1000watts of Power! any sugestions are apreciated. ps the center only worked when its not on the direct format when its direct the main front and left speakers work.