The Microsoft Windows firewall present in several of their OSes will prevent the Nucleus FTP Server from successfully establishing an Active Data connection. Disabling the firewall or creating an exception for the FTP traffic should remedy this.
Connecting a USB mouse to the client computer could cause a failure of active data connections from the Server. Reverting the drivers back should fix the issue
XPROT needs to have the FTP Buffer sizes tied to the NET_PARENT_BUFFER size due to typecastings.