Help! Pro Tools won't start Pro Tools with TDM requires the TDM mixer plug-in in plug

[Winterland]

Pro Tools 7.4 HD Mac G5 usually a rock solid system.

Pro Tools wouldn't start today, would get spinning ball of death.
Trashed preferences, permissions etc and then Pro Tools worked. Closed and tried again and got the ball again.

Had not changed anything on system etc. So now I started looking around to see what is conflicting. I looked in the Plugins folders and thought maybe some plugins we loaded in a week ago for a client with an ilok might be an issue. I moved a few plugins around.
I was confused about the plugins folder under Digidesign applications being an alias. I made a new plug-ins folder put the plugins into it then restarted. Probably shouldn't have as I realized the alias was referencing the Plugins folder under the digidesign library.
I then made a new alias and got things looking the way it was before I messed with things.

We have 2 systems and I made sure we have all the plugins that should be there by referencing the working system.

Sorry for going on and on but figure it is best to give all details.

I now get the prompt below when Pro Tools is starting.

Pro Tools with TDM requires the TDM mixer plug-in in the plug-ins folder.

The only thing I can think is the stereo mixer plugin which is in the plugins folder.

Any ideas of what happened and how to fix?

At a stand still.

Thanks