MoviePlus X6: How to remove background Audio echo?

Hi,

I'm a new user with MPX6 and I'm still learning it. I've got everything where I want it except my audio. The audio file is of good quality but it was shot in a large room so there is a "cave like" sound as my talent talks. There is no background noise or anything distracting so I think I can fix it if I use the right settings...

I've played with the audio effects portion but have managed to make it sound worse than better. Any ideas on what audio effects combo I might try to fix it?

Any help would be appreciated. Thanks! SM:HELP