LinuxQuestions.org - Two versions of Glib?

At the moment I'm installing some software, but therefore I need atk. But atk keeps giving this error message:

Code:

checking for GLIB - version >= 2.0.0... 

*** 'pkg-config --modversion glib-2.0' returned 2.4.0, but GLIB (2.2.1) 

*** 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 no configure: error: 

*** GLIB 2.0.0 or better is required. The latest version of 

*** GLIB is always available from ftp.gtk.org. If GLIB is installed 

*** but not in the same location as pkg-config add the location of the file 

*** glib-2.0.pc to the environment variable PKG_CONFIG_PATH.

So I installed glib2-2.4.0, set $PKG_CONFIG_PATH, but it still won't work :mad:
If I install glib2-2.2.1, atk gets installed, but I really need v2.4.0 (for some other software)

Can anyone help me?