OK tried out to flash it, didn't worked.
Second time I deleted the existing seclauncher2 apk and odex, and reflashed also didn't worked and then was no seclauncher.apk in the system/app folder..
Third time I used the odex, which I made a backup of (quite stupid to forget to do the same for the apk), and used your apk and it worked. I really expected it to fail like many of my attempts.
So thanks for the help.