Blank screen at end of video

I was creating an csv file working with videos of .wmv files for the DirectRT program. For some reason, after if runs all the stimulus till the end, it will reach to a blank white screen and remain like that until we terminate the executeDRT.exe in the task manager (data files are not recorded). I made the key 1 through 7 as a possible input and it seem that some number worked till the end of the files with no blank screen appears while if we enter the number 1 it always give us the blank screen. I think this could have been a computer problem and not the code itself because I tested it at other computer and it worked fine. A sample identical code for what I have is attached (without the stimulus).

I really have no idea. Note that the computer I am using that has the error does not have microsoft word (though I doubt this is the problem). And we are using DirectRT 2006.

I don't see anything wrong your input file. To see if it's something to do with this particular computer, you might try experimenting with different video file types and also possibly varying the display time (i.e., from 3000ms to amounts both longer and shorter than the video). Otherwise, I'm not sure, I've never heard of an issue like this from any previous version.