after 2 days was time to change the Icon for the installer.
Lot of people her have the problem thats the programm is not a valid win32 application after building an application with an custom icon, me too.
I tried a lot of Icons, make something by self. Check with an Exe-Editor the difference in the setup.. but nothing help.
Read again in our forum.. test that.. test this..
After view hours I tried on an virtual XP Pro with the Demo Version and its works with my custom Icon.
The difference to my local system is.... i have an Vista Ultimate 64Bit Client...