There was a bug in the original EPS system that prevented using more than 1 emitter - I would have thought that this was fixed by now but if not you can download an (unofficial) bug fixed version from here (2nd link - tutorial files):
http://data.forumhoster.com/forum_smiff/index.php?s=caaf8c2983d48736e3e84ba46c3bfb7b&showtopic=13
http://data.forumhoster.com/forum_smiff/index.php?s=caaf8c2983d48736e3e84ba46c3bfb7b&showtopic=13