@Wynner I resolved my issue because in fact i have 3 environments, and i was ponting the listProcessor to the wrong environment. I have my local file system Windows 8.1, with VirtualBox, running CentOS 7, and on top of CentOS i have the sandbox, and i was pointing my folder to the CentOS layer. My /media/sf_SharedFolder was placed in CentOS and not in sandbox.
I have to thank you for your help.
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