Beaglebone USB connection Virual machine

After the following commands i can’t get a connection in Virtual machine.

  1. Rev C: Open the file /boot/uboot/uEnv.txt in an editor (vim/nano)
  2. Add the key “capemgr.enable_partno=”
  3. Add the ports you want to enable, comma separated (BB-UART1, BB-UART2. BB-UART4, BB-UART5)
  4. Reboot

In windows it is still working with Putty/SSH or webbrowser but in Virtual machine with ubuntu it doesn’t start the FAT partion
Also cant login over the webbrowser or SSH.

can someone help me?