Check the activity log in hips client when the scan is running, also you must activate server rules in epo to translate epo events to DB. The latest patch for epo and extension versions must be installed in Epo 4.0/4.5.
If you want to test hips you can try to trigger id 413 "suspicious double file execution this assumes you are trying to test the IPS portion:
1. create a file with a double file extension and try to open it. like make a text file such as "hips test.com.txt" and try to open it. (on the client where hips is installed of course)