error GTK old version

[DMouse <dmoouse gmail com>]

checking for pkg-config... /usr/bin/pkg-config
checking for GTK+ - version >= 2.4.0... 
*** 'pkg-config --modversion gtk+-2.0' returned 2.10.11, but GTK+ (2.10.6)
*** was found! If pkg-config was correct, then it is best
*** to remove the old version of GTK+. 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: maybe you want the gtk-gnome-1-2 branch?

how to delete old version 
any idea? :P 
thanks!
-- 
SoNomas...!!!!