Try setting your 'Response Window' to 30 seconds and click Save instead of Apply and then Save (more on that below). I just had my correlation time at the same settings as you and it wouldn't work. I changed that and it started working as intended.
I've recently upgraded to 5.6 and it looks like when you click Apply, the Correlation Time does not save, if you've updated these. I did find that just clicking Save instead of Apply and then Save, made the change stick. I don't know if that is just an issue with mine or just an issue in general.
I've tried to find some good documentation on the Correlation Time, but have yet to find any that clearly defines what the fields mean and what are acceptable values in these fields. I hope this helps!