cannot get any Scilab 5.x version starting on my Intel iMac

[Heinz Nabielek]

SciLab and Mac friends: 
I cannot get any Scilab 5.x version starting on my Intel iMac 10.6.5. 
A Scilab 5.2 beta version had  worked at one time, but not any more. 
Starting error messages are shown below.
Help greatly appreciated. Heinz

Process:         scilab-bin [1396]
Path:            /Applications/scilab-5.2.2.app/Contents/MacOS/bin/scilab
Identifier:      org.scilab.modules.jvm.Scilab
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  sh [1371]

Date/Time:       2010-11-14 16:06:49.876 +0100
OS Version:      Mac OS X 10.6.5 (10H574)
Report Version:  6