Help with install script

I have a problem in my install script and idk how to fix it to flash integrated kernel image from zip to rom. On my older galaxy mini 2 , this method worked. but now it fail. Maybe samsung has changed something, so please help me to figure out how to solve it. Here is how the flashing lines are looking:

Code:

---

mount("/dev/block/mmcblk0p16", "/dev/block/mmcblk0p15", "/dev/block/mmcblk0p3", "/system");
assert(package_extract_file("boot.img", "/tmp/boot.img"),
write_raw_image("/tmp/boot.img", "/dev/block/mmcblk0p16"),
delete("/tmp/boot.img"));

---

File gets copied on tmp but recovery log says: assert failed: write_raw_image.... ERROR 7

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