MASM32-Testprogramm

Hallo,
ich versuche unter Win-XP bzw. Vista ein winziges Assemberprog.
mit MASM32 zum Laufen zu bringen. Dieses verabschiedet sich aber beim 
int 21h.
Die Trace-Infos kommen noch raus, dann ist aber Schluß:
Kann mir jmd. sagen, was ich da falsch mache ?
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DL = 41 (EXAMP1 - Kopie (2).asm, 22)
---- Test string --- (EXAMP1 - Kopie (2).asm, 23)
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Programmcode
.386
.model flat, stdcall
.STACK 100h
 option casemap :none   ; case sensitive
 include \masm32\include\windows.inc
 include \masm32\include\kernel32.inc
 include \masm32\include\masm32.inc
 include \masm32\include\debug.inc
 includelib \masm32\lib\kernel32.lib
 includelib \masm32\lib\masm32.lib
 includelib \masm32\lib\debug.lib

;DBGWIN_DEBUG_ON = 1 ;turn it off if you don't want to include debug 
info into the program
;DBGWIN_EXT_INFO = 1 ;turn it off if you don't want to include extra 
debug info into the program

.stack
.data
.code
org 100h
BEGIN:
   mov DL,'A'
   PrintHex DL
   PrintText "---- Test string ---"
   PrintLine
   int 21h
end BEGIN