More voices on LE with G4???

[Hertz Deep]

First up, Hello all!, as this is my first post up in here.
Seems like this forum is pretty active, so hopefully one of you will be able to help.

I've read the previous related threads I can find and I realise I am limited to 32 voices with LE & Mbox,....
But I seem to be limited to only a max of 11 voices after playing with the playback settings and even then PT does not seem to play back it just stops itself.
My setup is -
Power Mac G4 Quicksilver
OSX 3
733Mhz
896MB RAM
Mbox
LE 6.4
Surely there is a way to optimise my mac to have the 32 voice limit , as if not with my current voice count I am only marginally better off than using the PT free version!

Please say someone has a fix for this?

Thanks in advance, see you all round the forum, and I'm sure I'll come up with some more taxing questions when I get into the software a bit deeper.
Pz.