Scope acquisition returning zero signal level 80% of the time

Hi. I am acquiring a 2 channel signal from an Agilent DSO7104A (1GHz) scope. Whether I use the single shot run or the continuous loop in the Labview front end, I only obtain a good signal once out of every 7-8 shots. The other signals are flat lined at zero. This is causing me to have to acquire thousands of shots so I can filter out the zero level signals and average the others. My company will not allow me to post any attachments so I cannot show you the code - but I have taken the BASIC labview example for agilent oscilloscope multichannel acquisition - there is nothing new or funny in there, in fact I copied and pasted it and just added a write to file and edge trigger. Can anyone help?

Unfortunately I cannot upload ANY document from my computer here, Aramco is recovering from an internet virus attack and has restricted ALL uploads and downloads of any nature. If you have an email address I can email you a pdf of the screen shot. My driver is ag6000. I got the example after I installed the driver from LabView from Getting Started Screen / Find Instrument drivers / Connected Instruments / then double clicking on ag6000 and it has several examples including acquiring multi channel waveforms. I literally copied and pasted the code then just added an edge trigger and write to file. I have tried adjusting trigger times - doesnt seem to make a difference. Can you let me email you?

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