not running dichotic sound file in DirectRT?

Hi, Sir

i am doing an experiment on dichotic listening task in directRT. in this experiment i am presenting two sound files simultaneously in both the ears.when i am running the file, i heard only first sound file in the left ear not a second sound file in the right ear. after a two second pause second row pair of words are heard but here i heard second sound file first in my right ear not a first sound file in my left ear. please suggest me something how to correct it and what to do to run both sound file simultaneously.
i am sending you the excel file two sound file .


thanks
priyaranjan