Check in the CMC > Servers > Event Server > Metrics. Do you see the trigger date/time change when the new file is created?
There is also a time value under properties of the Event Server. If the file is deleted and recreated too quickly, it doesn't get triggered.
Also, your job is set to recurring every 6 min correct? The file need to appear in the folder AFTER the next run time. If it appears before, it will be ignored.