I am using IEvolution 4.4.10 on a machine. I did install ImageMagick (32 bit) and Ghostscript on another machine with my EXE which uses IEvolution to display a PDF image. However, the application when run on another machine, does not display PDF images, only TIF/JPG/etc.
Are you sure you installed the ImageMagick version that matched the bitness of your application? I.e. for 32bit applications, install 32bit ImageMagick (even if the system is 64bit).