Any ideas on why 3 out of my 4 new Source Four Parnels are not dimming? The give off a "clicking" sound when they go on at full, and then shut off around 14% without dimming. I have checked the patch on our ETC Element control board and the dimmer info at the CEM+ rack. The 3 that don't dim seem to have the same set-up/parameters as the one that will dim. They are the only 4 parnels I have so I can't compare them to anything else in my system except the one that does dim. All 4 fixtures are on the same electric and have replaced old Altman fresnels that barely threw any light. Thanks for the help!