Office Home And Student 2010 batch stops on comman

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Petr Laznovsky 29.09.2010 - 16:53Hi there,Windows 7 Product Key,
there may be batch which beginning similar to this:
@echo OFF
setlocal ENABLEDELAYEDEXPANSION
chcp 65001 >NUL
::
::
if "%1"=="" goto par_mis
if "%2"=="" goto par_mis
if "%3"=="" goto par_mis
under Win7 work fine,Office 2007 Activation Key, but under Windows2003 batch unexpectedly finish
after line:
chcp 65001 >NUL
No error message,Office Home And Student 2010, %errorlevel% is 0
When i put REM before this command,Office Home And Business 2010, than work fine.
Any ideas??
L.