i can't drag and drop on virtual machine set to bidirectional code example

Example: drag and drop not working linux virtual machine

VBOX_RELEASE_LOG_DEST="file=/tmp/VBoxClient.log" VBOX_RELEASE_LOG_FLAGS="time tid thread" VBOX_RELEASE_LOG="all.e.l.l2.l3.f" /usr/bin/VBoxClient --draganddrop