BP Corporate 1.1.5 to 1.1.6


I'm trying to move to the new bp-coporate under bp1.1.3 in order to get to BP 1.2. I realize that I the new theme has been changed to use parent & child themes. When I implement the new bp-global-adminbar-css.php my site gets reduced to trash and I can't login to the site admin:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META content="text/html; charset=windows-1252" http-equiv=Content-Type></HEAD>

When I put the old one back in, the page remains trashed. The only difference seems to be
if($blog_id == 1) {
to this:
if($blog_id == BP_ROOT_BLOG) {

and that my site no longer works so I need the hosting service to restore.

My migration plan was to:
1. Deactivate BP-Corporate and go to BP-Fun, so I would have the chance to Preview the new bp-corporate b4 activating.
2. Rename bp-global-adminbar-css.php to bp-global-adminbar-css115.php
3. Upload the new bp-global-adminbar-css.php
>>>>Here is where I checked out to see my site was trashed.<<<<
4. Rename the bp-corporate theme folder to /bp-corporate115/
5. Upload the new BP-corporate theme folder.
6. Upload bp-corporate-child folder as /bp-corporate-wc/
7. Login to the site admin, make sure the bp-corporate theme was available and preview it and the new bp-corporate-wc child.
At this point I figured to learn how to use the child to make my local revision.

Where did I go wrong?

Kind regards,