-verbose:class
in your command line.For the qpose issue, there's a how-to here which might be helpful: http://zaurus.kruss.com/howto-qpose.php
For the Java error: in your Java installation, the installed System class doesn't have a setProperty() method, or it doesn't expect two Strings as parameters. See if you have more than one "System.class" file, if so, check which of them is being used at run time by addingCode: [Select]-verbose:class
in your command line.