Sonar X3 and Enttec DMXis

Hi folks,

Just a shout out to anyone using Sonar and Enttec DMXis in a live application. I'm having an issue getting the lights to fire exactly at the time designated by the midi note on. For example, when triggering a preset at 5:01:000 or 5:02:000 or any other beat in a measure, DMXis fires the chosen lights milliseconds before the actual trigger time. I was using a Chauvet Obey prior to purchasing the Enttec software and had no problems. It was dead on. I am currently compensating for the premature triggering by firing sooner but I'm sure I shouldn't have to. Not sure what I am missing. Any thoughts and thanks in advance.