devIL failing to load an image


I am trying to load a PNG image using devIL.
This is my makefile(OS: ubuntu 12.04):

#OBJS specifies which files to compile as part of the project
OBJS=LTexture.cpp LUtil.cpp main.cpp 

#CC specifies which compiler we are using 
CC= g++

#COMPILER_FALGS specifies the additional compilation options we're using
# -w suppresses all warnings

#LINKER_FALGS specifies the name of our executable
#The "LINKER_FLAGS" macro specifies which libraries we're linking against. Here we're compiling against OpenGL, 
#GL Utilities, and freeGLUT. Notice how there's a -l flag before every library.
LINKER_FLAGS = -lGL -lGLU -lglut 

#$(pkg-config libglfw --libs) 
DEVIL_FLAGS = $(shell pkg-config ILU --libs) 

#OBJ_NAMe specifies the name of our executable
OBJ_NAME = 06_loading_a_texture

#This is the target that compiles our executable

there is no warning or error during compilation but when I run the executable I get this:

Unable to load 06_loading_a_texture/texture.png
Unable to load file texture!
Unable to load media!

Is there anything wrong with my makefile?