error while loading shared libraries: libQtCore.so.4: cannot ope

I follow this tutorial
http://mini2440vietnam.blogspot.com/2011/04/upgrade-qt462-in-mini2440.html
I successfully compiled Qt4.6 and tslib. I reset the board to load
Fluidlauncher but it gave me this error

error while loading shared libraries: libQtGui.so.4: cannot open shared
object file: No such file or directory

When you did this part:

#place your SDcard into mini2440 board, copy all file to the board.
#in mini2440 console
$mkdir /usr/local/Qt/lib/
$cp /sdcard/*4.6.2 /usr/local/Qt/lib/
#rename all *.4.6.2 in /usr/local/Qt/lib into *.4, for example
$mv libQtCore.so.4.6.2 libQtCore.so.4 

did you actually have a libQtGui.so.? that you could mv  ?