Removing slight echo with audtion - recorded in room with hard walls

Hi

I just downloaded a trial of Audition CS4 for windows.

I have already used it to remove a few clicks which are evident in this short (attached) PRE-audition sample.

Now I would like to go in and remove (if possible) or at least reduce the slight "echo" of the room itself.  You can hear the "echo" in this attached wav file.

I realize I might not be able to remove all of the "echo" but if I could remove some of it it would be nice.

Thanks

Rowby