ispell spanish problem

["Luis O. Silva" <l.o.silva@mail.ru>]

Dear Emacs community,

After failing to obtain on the web any hint to solve the
following problem, I decided to post it.  I have ispell 3.1
installed on my system and GNU Emacs 21.2.1
(i386-debian-linux-gnu, X toolkit, Xaw3d scroll bars) of
2002-03-22 on raven, modified by Debian.  I also have the
following element in the alist of dictionaries
`ispell-dictionary-alist'

("castellano8"
 "[A-Z\301\311\315\321\323\332\334a-z\341\351\355\361\363\372\374]"
 "[^A-Z\301\311\315\321\323\332\334a-z\341\351\355\361\363\372\374]"
 "[-]"
 nil
 ("-B" "-d" "castellano")
  "~latin1" iso-8859-1)

For all the others entries of this alist: "russian", "american"
and "british", `ispell-buffer' and `ispell-region' work fine,
however `ispell-buffer' and `ispell-region' with the
"castellano8" dictionary can not recognize non-ascii
characters. It must be noted that in a terminal the command:

ispell -T latin1 -d castellano <file>

works fine. Do you have any hint for solving this problem?

Thank you very much in advance.
luis