ePrime Posner Cueing task issue

We are using a modified Posner cueing task and are having trouble with randomizing the probe location (invalid vs. valid). Right now the issue is that the probe location only appears as valid (I.e., it only appears where the visual stimuli was presented). We have the probe location in eprime as set to Xloc:50% so it should be random, but it somehow only is only showing where the visual stimuli was.

Any ideas?