I remember having a similar issue with NetFoss for me.
I did end up getting it running (but lost my notes as to what it was). 
I registered mine as well at Christmas.
Your .bat looked ok.
What do your NODE#.DAT files look like?
Here is an example of one of my nodes (1):
BBSNAME Files 4 Fun BBS
BBSTYPE DOORSYS ;I use DOORSYS myself
;COMPORT 0
FOSSIL
LOCKBAUD 19200
STATUS ON
STATFORE 3
STATBACK 7
;COLOR1
;NODIRECT
;UNUSED
BBSDROP e:\mystic\temp1  ;Matches your NODE# Directory
;UNUSED
;UNUSED
;UNUSED
If you have your Mystic Server running in the background, you can see the
local screen by using the Snoop window. You may be able to see the LORD2 running locally but not remotely. 
Tim N
admin@f4fbbs.com
--- Mystic BBS v1.12 A44 2020/01/16 (Windows/32)
 * Origin: Files 4 Fun BBS (21:2/120)