The demo doesn't work

[Gwl]

Hello !

My case :
PPC G5 2x 2Ghz / Mac OS 10.4.3 / 1,5G ram / GeForce6600LE.

When i click on the demo, i have a black screen, and an immediate return to the finder.

These are the crash report i have found, i don't know if it can help :

"Jan 12 22:20:02 power-mac-g5-Gwl crashdump[405]: PenumbraDemo crashed
Jan 12 22:20:03 power-mac-g5-Gwl crashdump[405]: crash report written to: /Users/Gwl/Library/Logs/CrashReporter/PenumbraDemo.crash.log
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct NULL not valid
2008-01-12 22:30:47.896 Finder[200] CFLog (0):
CFPropertyListCreateFromXMLData(): plist parse failed; the data is not proper UTF-8. The file name for this data could be:
Contents/Info.plist -- file://localhost/Applications/Penumbra%20Overture%20Episode%201%20Demo/PenumbraDemo.app/
The parser will retry as in 10.2, but the problem should be corrected in the plist.
2008-01-12 22:30:48.940 Finder[200] CFLog (0):
CFPropertyListCreateFromXMLData(): plist parse failed; the data is not proper UTF-8. The file name for this data could be:
Contents/Info.plist -- file://localhost/Applications/Penumbra%20Overture%20Episode%201%20Demo/PenumbraDemo.app/
The parser will retry as in 10.2, but the problem should be corrected in the plist.
2008-01-12 22:39:34.459 DiskImages UI Agent[430] Could not find image named 'background'.
2008-01-12 22:40:19.620 Finder[200] CFLog (0):
CFPropertyListCreateFromXMLData(): plist parse failed; the data is not proper UTF-8. The file name for this data could be:
Contents/Info.plist -- file://localhost/Applications/Penumbra%20Overture%20Episode%201%20Demo/PenumbraDemo.app/
The parser will retry as in 10.2, but the problem should be corrected in the plist.
Jan 12 22:40:26 power-mac-g5-Gwl crashdump[443]: PenumbraDemo crashed
Jan 12 22:40:27 power-mac-g5-Gwl crashdump[443]: crash report written to: /Users/Gwl/Library/Logs/CrashReporter/PenumbraDemo.crash.log
Jan 12 22:49:29 power-mac-Gwl crashdump[456]: PenumbraDemo crashed
Jan 12 22:49:30 power-mac-Gwl crashdump[456]: crash report written to: /Users/Gwl/Library/Logs/CrashReporter/PenumbraDemo.crash.log"

Does it make some sense for you ?
Thanks for the help, if you can !

Bye
G