Dia 0.97.1 cannot be loaded on Mac OSX

[Kazuhiko Yamamoto <minameg d2 dion ne jp>]

Hello

I installed Dia 0.97.1 for Mac OSX using downloaded installation package.
When I try to start Dia, the icon of Dia appears in Dock, swings few
times and disappears. And nothing happens after that.
I have X11 installed which works well with GIMP. I guess I don't have
some crucial stuff except X11, but I cannot find any clue in FAQ and
Bugzilla.
Could you give me some advice?

My Mac :
Mac OSX 10.6.7
on
iMac
1.83 GHz Intel Core Duo 2GHz
1.5GB 667 MHz DDR2 SDRAM

Best regards,
Kazuhiko Yamamoto
Kawasaki city, Japan
minameg d2 dion ne jp