Lectora / Flash Question

I've got a frustrating Lectora (2006) / Flash problem. I'm hoping I can get some ideas. Here's the situation:

We had a rather large Flash simulation developed for use in my course. This Flash file is actually broken up into several "pieces" - within the simulation's folder (titled "sims") are the following files: index.html, a couple of supporting .swf files and two folders that have a host of subfolders containing various screenshots, audio files, etc. When played directly from my desktop, it's very simple to run - double click the "index.html" icon and everything runs fine.

Within my Lectora course, I have a button with the following commands in the "ON CLICK" tab:

ACTION: GO TO

TARGET: WEB ADDRESS

WEB ADDRESS: sims/index.html

OPEN IN NEW WINDOW

After I publish my Lectora course, I copy the "sims" folder - along with all of its contents - into the published files. The sims folder resides on the same level as the published files. However, when I view the course on our LMS, nothing appears in the new window (for a while, IE was indicating the presence of a JavaScript error, but I was able to resolve that. Right now, IE does not indicate that there are any JS errors).

This is a technique that we've used numerous times in the past to launch simualtions developed in a similar fashion. So far, I've attempted the following, all obviously with no luck:

1. Move all sim files to reside on same level published files (i.e. no "sims" folder") & edit button to point to "index.html"

2. Edit button to point to "index.htm" (not "index.html")

Any ideas/input that anyone can suggest would be greatly appreciated..thanks!