Emacs under windows xp. global: GTAGS not found.

[paolo.unx]

hello:

I am running emacs on windows xp : c:/emacs231
The remote taget file: ~/sourse/tools/main.c  and main.h

first:

    * Downlod the GLOBAL5.7.7(WIN32) from "http://adoxa.110mb.com/global/index.html".
    * Copy bin/global.exe, gozilla.exe, gtags.exe, gtags-cscope.exe, gtags-parser.exe, htags.exe   to    c:/emacs231/bin
    * Add/Set "c:/emacs231/bin"  to the path of environment variable of windows .
    * modify ".emacs" file.

          After,GLOBAL was effective only for the local sourcecode on windowsXP.

next:

    * set GNU tramp on windowsXP.(OK)

next:

    * set "(setq shell-file-name "bash")" in ".emacs" on windowsXP.
    * Make emacs to start on WindowsXP.
    * C-x C-f /lb@<ip address>:/home/lb/sourse/tools/main.c after put password.(open the target file:OK)
    * M-x shell(type “gtags -v”，the file “GPATH、GRTAGS、GSYMS、GTAGS”  be generated)

however：
Press the middle button of the mouse on the fuctions of the target file,  "global: GTAGS not found." been to show.
May you suggest anything for the "global: GTAGS not found." problem ？

Thanks.