Are you sure you are on Acrobat 9.0? I am not referring to updates, but an upgrade. The reasons I ask is that it all seems to work fine here, but there is no Acro Tray that I can find anywhere in the program, files or folders. There is nothing in the tray, like there was with earlier versions. Google says it is part of Acrobat Distiller, is that what you have?
Also, when you download the installation program, you are given a choice for the Google Toolbar. Did you install the toolbar as well? I want to duplicate your setup as close as possible.
This is what I installed so far;