FDT2411 under VirtualBox: fdnet hang (when it is already running)

Seems like fdnet was launch in autoexec.bat after installation.

Trying to run it with: fdnet results in:

Réseau Virtuel détecté

1 match(es) found
Packet driver for an PCNTPK, version 02.20
Packet driver copyrights[...]
[...]
Packet driver is at segment 07ea
PCNTPK-DOS-005: There is already a packet driver at
[HANG THERE, cursor blinking at the beginning of the line]

Can be stop with Ctrl-C