I downloaded the virtual machine, but when I open it in VirtualBox it does not boot, showing an error related to PAE kernel.
Solution: Activate PAE/NX option in VirtualBox. Go to the Settings Menu, and in the System, Processor, Enable PAE/NX.
Even after setting up ContextNet (SDDL), Eclipse shows an error message that it cannot find the dds_java native library.
Solution: Disable ContextNet library in system level. In Eclipse, navigate in the Windows → Preferences menu. After that, expand the Java → Build Path → User Libraries tab. Edit the ContextNet Library, and disable System Library option.