ReWiring max/msp into Pro Tools

I've been trying to get this to work for a while with no success at all. I'm hoping someone can state a definitive answer to this. This has been discussed in previous threads and I have tried all solutions offered without success.
system specs;
Mac OSX 10.4.8
max/msp v 4.5.2
Pro Tools HD TDM 7.3.1
ReWire 1.7
Here is a list of things that may point someone in the right direction to get this to work.
- Other ReWire plugins appear as inserts in Pro Tools, i.e. Melodyne, Waves ReWire.
- There are admin restrictions on these systems (educational facility) I have a suspicion that a file may need to be written to that is currently read only. If this is the case, what file? I could therefore enable read/write permission.
- Originally, the ReWire application support directory only existed in the Mac HD > Library. When this was copied to the studio profile login (the main login that users will use), the Waves ReWire plugin appeared in Pro Tools when before it hadn't. The max/msp rewire device plugin file existed in this directory yet it didn't appear in Pro Tools. All this leads me to believe that perhaps files and alias's are not pointing in the right directory.
- Does ReWire need to be installed into a specific directory?
- When I start max and select ad_rewire, an alias pointing the the max rewire device file is created in the application support directory of the studio profile, maybe it needs to be pointing somewhere else?
- We have another system set up, identical except that it is running Pro Tools LE 7.3.1. On this system, max does rewire into Pro Tools and works the way it should.
- Can anyone with a similar set up qualify that max does reire into a pro tools HD system?

So hopefully that is enough to get any audio specialist started on solving this interesting conundrum. I'm looking forward to some answers!

Thanks