[Pellet-users] PRONTO: can't run examples

[robocop]

Hi all,
I'm approaching to Pronto then, after having downloaded it (and 
or124.jar in the lib directory also), I'm trying to run the example from 
the batch file in the Pronto's directory but I get this exception on the 
launch:
Exception in thread "main" java.lang.NoClassDefFoundError: 
drasys/or/opt/lp/LPException
  at com.clarkparsia.pronto.PSATSolverImpl.<init>(PSATSolverImpl.java:49)
  at com.clarkparsia.pronto.PSATSolverImpl.<init>(PSATSolverImpl.java:53)
  at 
com.clarkparsia.pronto.ProntoLexicographicReasoner.<init>(ProntoLexicographicReasoner.java:55)
  at com.clarkparsia.pronto.Pronto.run(Pronto.java:113)
  at com.clarkparsia.pronto.Pronto.main(Pronto.java:57)

Can anyone help me?

I'm using JDK 1.6 on Windows if it can useful...