Check your triggering setup. From the image you posted from your 1052E, it appears that you'll want edge detect triggering on the falling edge (since it appears the signal is active-low), with a 1ms holdoff.
What are all of your settings for the trigger? A screenshot of them from your 1054Z might help clarify things.
Oh, and you probably want "normal" trigger mode for this, not "auto", so that you see only the signal.