I went trough the demos and it seems works as expected in JBDS aside from several exceptions in eclipse log.
What exactly do you Run/Debug?

eclipse.buildId=unknown
java.version=1.6.0_33
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=fr_FR
Framework arguments: -product com.jboss.jbds.product.product
Command-line arguments: -data C:\p -os win32 -ws win32 -arch x86 -product com.jboss.jbds.product.product

Error
Thu Jun 28 09:38:50 CEST 2012
Exception occurred executing command line.

java.io.IOException: Cannot run program "C:\jre6\bin\javaw.exe" (in directory "C:\p\brms-rewards-demo"): CreateProcess error=206, Nom de fichier ou extension trop long
at java.lang.ProcessBuilder.start(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at org.eclipse.debug.core.DebugPlugin.exec(DebugPlugin.java:848)
at org.eclipse.jdt.launching.AbstractVMRunner.exec(AbstractVMRunner.java:73)
at org.eclipse.jdt.internal.launching.StandardVMRunner.run(StandardVMRunner.java:317)
at org.eclipse.jdt.launching.JavaLaunchDelegate.launch(JavaLaunchDelegate.java:101)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:854)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:703)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:937)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1141)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.io.IOException: CreateProcess error=206, Nom de fichier ou extension trop long
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 11 more

Do you have mentioned locations? The exception says "File name or extension is too long" which comes from operation system. Does it work when you run it from command line?

I find a solution:

There are many jar files links into "JBoss BRMS 5.3 Librairy" with long path.

When I move all jar files to the Hard Disk root and I change Eclipse Classpath links to them, Run and Debug passed !

Thanks Denis

There haven't been any commits connected to this so nothing really to verify. Also, the user seems to be happy with Denis' resolution. Thus closing this issue. Please feel free to reopen if needed.