Logic Pro 9 is having signal delays

I’m using Logic Pro 9 to edit, mix, and record music on my Macbook. This Logic Pro 9 application runs on Rosetta 800 interface. I forward the tracks to a rack gear for more tracking after mixing and compressing the music using external analog EQs. The Logic Pro 9 is having a problem. This involves signal delays of 5 to 25 milliseconds. Even when the low latency monitoring is on, the Logic Pro signal delay still occurs. However, the performance of the Logic Pro 9 is better. Any idea on how the problem can be remedied? Thanks for helping.
