Roo Not Working

I have donwloaded STS (2.1.0 SR01) and began to read something about ROO. I understand this version includes ROO. The problem is that when I go to DOS and run ROO, I receive the following error:

Exception in thread "main" java.lang.NoClassDefFoundError: de
Caused by: java.lang.ClassNotFoundException: de
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Could not find the main class: de. Program will exit.

This doesn´t give a clue about what the error could be. This are my settings to env variables:

C:\>echo %JAVA_HOME%
C:\Archivos de programa\Java\jdk1.6.0_12

C:\>echo %ROO_HOME%
C:\Archivos de programa\Springsource\roo-1.0.0.RC1

C:\>echo %PATH%
C:\orant\bin;C:\Oraclexe\app\oracle\product\10.2.0 \server\bin;C:\WINDOWS\system3
2;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\orant\jdk \bin;C:\ARCHIV~1\ULTRAE~1;C:\A
rchivos de programa\Informix\Connect\bin;c:\Archivos de programa\Microsoft SQL S
erver\100\Tools\Binn\;c:\Archivos de programa\Microsoft SQL Server\100\DTS\Binn\
;C:\Archivos de programa\SlikSvn\bin\;C:\Archivos de programa\Springsource\roo-1
.0.0.RC1\bin\;C:\Archivos de programa\Apache-maven-2.2.1\bin\;C:\ORAWIN\BIN;

Any help ?
Regards, Javier