running Qt application on computer without Qt

[vonCZ]

To simplify things: I used the following .pro file

######################################################################
# Automatically generated by qmake (2.01a) Tue May 29 23:32:12 2007
######################################################################
 
TEMPLATE = app
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .
 
# Input
HEADERS += dialog.h
SOURCES += dialog.cpp main.cpp

######################################################################
# Automatically generated by qmake (2.01a) Tue May 29 23:32:12 2007
######################################################################

TEMPLATE = app
TARGET = 
DEPENDPATH += .
INCLUDEPATH += .

# Input
HEADERS += dialog.h
SOURCES += dialog.cpp main.cpp

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to create a Visual Studio project using qmake (WindowsXP). This is the simple "basic layout" Qt demo that comes with the Qt installation. It compiles/runs fine, but when I copy

basiclayout.exe (release version)
QtCore4.dll
QtGui4.dll

to a directory on another computer that doesn't have Qt installed and try to run it, I get error:

The Application failed to start because the application configuration is incorrect.

What am I missing?