png generation and lilypond 2.5.29-2 on winxp

[Roman V. Isaev]

I installed 2.5.29-2 and everyhing was same -- no png generation at all.
And I could not get any diagnostics after make-ps-images got called.
Everything gets silent after this:

    (ly:message (_ "Converting to ~a...") "PNG")
    (make-ps-images name resolution paper-size rename-page-1? verbose?)

"Converting to PNG" line is the last in the log file and then nothing.  
(ly:message "test\n") works okay if inserted before make-ps-images call but 
not after or inside make-ps-images.

I even moved whole contents of ps-2-png.scm into backend-library.scm. No luck.
But I noticed that with --png command line option dos window comes up
twice. So I renamed gs.exe and made gs.bat with pause after ghostscript 
invocation. Here is output -- apparently ghostscript fails when it tries
to generate png on my machine:

GPL Ghostscript 8.15 (2004-09-22)
Copyright (C) 2004 artofcode LLC, Benicia, CA.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Error: /undefinedfilename in ('canzone.ps')
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval-
-   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   fa
lse   1   %stopped_push
Dictionary stack:
   --dict:1129/1686(ro)(G)--   --dict:0/20(G)--   --dict:70/200(L)--
Current allocation mode is local
Last OS error: No such file or directory
GPL Ghostscript 8.15: Unrecoverable error, exit code 1

Any clues how to fix this?..

-- 
 Roman V. Isaev         http://www.soprano-recorder.ru         Moscow, Russia