Need help with Auctex installation

[Tong Wang]

Hi there,
        I am trying to install Auctex for Emacs and got some problems here. I 
have been struggled for a while, please
help me out here. 

System:   windows XP + Cygwin
Emacs:  emacs-21.3 (for windows, binary downloaded and used without 
installation)
Latex: Miktex    ( I have put its directory  c:/texmf/miktex/bin   at the 
biginning of both PATH variable of Cygwin and Windows) 
Auctex: auctex-11.82
Compilation:  ./configure --prefix='c:/cygwin/home/Owner/emacs-21.3' 
--with-texmf-dir='/cygdrive/c/localtexmf' --disable-pre
view  ( followed by make, make install,  ALL WENT THROUGH WITHOUT ERROR)  
.emacs:    (setq load-path (cons "~/auctex-11.82" load-path))  ;   (require 
'tex-site)      NO ERROR ON STARTING EMACS

But when I try to latex a file in emacs,  I always got the following error: 
 " This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4)
    kpathsea: Running mktexfmt latex.fmt
    /usr/bin/mktexfmt: line 333: /texconfig/tcfmgr: No such file or directory
    fmtutil: config file `fmtutil.cnf' not found.
    I can't find the format file `latex.fmt'!    "
My guessing: It looks the emacs is still trying to use the Latex comes with 
Cygwin,  but even if I do : latex  myfile.tex   in Cygwin , it calls the miktex 
and works very well.   Could someone tell me how to refer emacs to the Miktex. 

Thanks tons in advance. 

best
tong