if you can no longer handle uucp logins with a new version of NT, try
these two things which have been suggested:

  1. run fxuucico with the `-i' parameter
  2. set S25 to not drop carrier except for LONG drops of DTR

==begin FAQ caption==
  From: niel@cal.indiax.com (Niel Hirjee)
  Newsgroups: comp.bbs.waffle
  Subject: Re: Waffle (DOS code) with WINDOWS/NT 4.0
  Message-ID: <1504lmd61.alamito@cal.indiax.com>
  Date: Wed, 12 Nov 97 11:04:21 EST

Try calling FXUUCICO with the -i option, to ignore carrier - I dont 
know why, but this is required in WIn95 & NT...
==end FAQ caption==

==begin FAQ caption==
  From: Bernard Guillaumot <guillau@easynet.fr>
  Newsgroups: comp.bbs.waffle
  Subject: Re: Waffle (DOS code) with WINDOWS/NT 4.0
  Date: Thu, 13 Nov 1997 02:16:35 +0100
  Message-ID: <346A54F3.B13A27A9@easynet.fr>

>> Perhaps, on the #Exit 40, Waffle lost DTR and the CD...

I have a solution, and it's working fine... the Hayes S25 register
(delay for hang up when the DTR is down...). 
==end FAQ caption==