InFocus LiteShow Manager crippled

I am using a MacBook Pro in my classroom to project wirelessly. When I installed OS 10.5 and attempted to connect by wifi to projector in my classroom (InFocus X2) using LiteShow Manager, I get a crash every time. Initially the program picks up the device and allows me to project, but when it resizes the resolution and downsizes the dialog box, there is about a one second delay and the application crashes with a nice line of vertical bars across the dialog box which reappears. This crash usually corrupts the icons in the bottom bar and changes them to gibberish or a 2D object.
I have reinstalled the Manager software on the computer and tried connecting to another projector in another classroom with identical results.
It ran flawlessly in 10.4.
I have contacted InFocus support, and so far had cheerful but ineffective help.
Any suggestions that I can try on the OS?