The first thing I would do is make sure you are getting a loud enough Input level on Eclipse without clipping. You can adjust Eclipse's Input Gain Level by pressing the LEVELS button. Also make sure the I/O mode is set to MONO 1. This is set on the second page of the LEVELS Button.
Do you have Eclipse software Version 4? (If not you can get it here.)
In V4 I would start with Preset 859, "IntoMix Dirt." You can adjust the amount of gain to taste.