Lilypond for Windows 2.5.28 - Guile error

[Thomas Scharkowski]

Hello list,

I have asked about a week ago:
Typing "guile" at cmd gives the following:

ERROR: In procedure primitive-load-path:
ERROR: Unable to find file "ice-9/boot-9.scm" in load path

This is my guile.bat:

@echo off
set GUILE_LOAD_PATH=C:\Programme\LilyPond\usr\share\guile\1.7
"C:\Programme\LilyPond\usr\bin\guile.exe" %1 %2 %3 %4 %5 %6 %7 %8 %9

The files are there.
What am I missing?
Wild guess: Could it be a "\" or "/" problem?

BTW, I still cannot start lilypond from cmd, I get no reaction, no 
error message.
Typing "lilypond" from the jEdit shell gives the same ERROR as quoted 
above.
I got convert-ly working now by installing python24 and copying 
"convert-ly" to "convert-ly.py". Shouldn't this be unnecessary?

Thomas