Glib not detected

[Vidhya CS <vidhya siptech co in>]

Hi ,
I have already installed glib2.0 in my system .
now I am trying to install atk-1.0.3 , which needs glib to be present ,
but when it(atk-1.0.3)checks for glib during ./configure , it says
configure:

error:
*** GLIB 2.0.0 or better is required. The latest version of
*** GLIB is always available from ftp://ftp.gtk.org/.

I also tried installing glib-2.0.7  and then ran the ./configure to
install atk-1.0.3

it throws the following error while running ./configure

checking for GLIB - version >= 2.0.0...
*** 'pkg-config --modversion glib-2.0' returned 2.0.7, but GLIB (2.0.1)
*** was found! If pkg-config was correct, then it is best
*** to remove the old version of GLib. You may also be able to fix the
error
*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing

*** /etc/ld.so.conf. Make sure you have run ldconfig if that is
*** required on your system.
*** If pkg-config was wrong, set the environment variable
PKG_CONFIG_PATH
*** to point to the correct configuration files
configure: error:
*** GLIB 2.0.0 or better is required. The latest version of
*** GLIB is always available from ftp://ftp.gtk.org/.

I also tried setting LD_LIBRARY_PATH and PKG_CONFIG_PATH to glib-2.0.pc

how should I set the LIBRARY_PATH or PKG_CONFIG_PATH so that

atk-1.0.3 recognises glib-2.0.7
any input or suggestion is  highly appreciated

Thanks
Vidhya.