cannot compile gtk+-2.0.5

[Alex <alex kaplan web de>]

hi!

I need some help: I'm trying to build gtk+-2.0.5 on my linux box.
I ran ./configure --prefix=/opt/gnome   - no problems
When run make, it gives me the following message:

[...]
Making all in stock-icons
make[3]: Entering directory `/home/alex/gtk+-2.0.5/gtk/stock-icons'
GDK_PIXBUF_MODULEDIR=../../gdk-pixbuf ../../gdk-pixbuf/gdk-pixbuf-csource					
		\
   --raw --build-list stock_add_16 ./stock_add_16.png stock_add_24 
./stock_add_24.png stock_align_center_16 ./stock_align_center_16.png 
stock_align_center_24 ./stock_align_center_24.png stock_align_justify_16 
./stock_align_justify_16.png stock_align_justify_24 
./stock_align_justify_24.png stock_align_left_16 ./stock_align_left_16.png 
stock_align_left_24 ./stock_align_left_24.png stock_align_right_16 
./stock_align_right_16.png stock_align_right_24 ./stock_align_right_24.png 
stock_apply_20 ./stock_apply_20.png stock_cancel_20 ./stock_cancel_20.png 
stock_dnd_multiple_32 ./stock_dnd_multiple_32.png stock_bottom_16 
./stock_bottom_16.png stock_bottom_24 ./stock_bottom_24.png stock_cdrom_16 
./stock_cdrom_16.png stock_cdrom_24 ./stock_cdrom_24.png stock_clear_24 
./stock_clear_24.png stock_close_20 ./stock_close_20.png stock_close_24 
./stock_close_24.png stock_colorselector_24 ./stock_colorselector_24.png > 
./gtkstockpixbufs.h ||	\
           ( rm -f ./gtkstockpixbufs.h && false )
failed to load "./stock_add_16.png": Unable to load image-loading module: 
../../gdk-pixbuf/libpixbufloader-png.so: libpng.so.3: cannot open shared 
object file: No such file or directory
make[3]: *** [gtkstockpixbufs.h] Error 1
make[3]: Leaving directory `/home/alex/gtk+-2.0.5/gtk/stock-icons'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/alex/gtk+-2.0.5/gtk'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/alex/gtk+-2.0.5'
make: *** [all-recursive-am] Error 2

Would be very nice if anyone could give me a hint how to solve this problem.
Alex