Stimulus list disappears!

I am presenting a stimulus list of 15 verbs to my participants for a span of 15,000miliseconds. When I try to run the experiment and the list comes up, after several seconds the list disappears (but still displays the event for the span of 15,000miliseconds, then moves onto the next event). Is this a glitch in the program, or am I doing something wrong?

It would be helpful if I can see what settings you are using. Can you post your experiment? Please post as an Experiment Package, which is found under the File menu within SuperLab.