installing the wxWindows

I'm trying to install the wxWindows, but the error is launched:
checking for GTK+ - version >= 2.0.0... no
*** Could not run GTK+ test program, checking why...
*** The test program failed to compile or link. See the file config.log for
the
*** exact error that occured. This usually means GTK+ is incorrectly
installed.
configure: error:
Please check that gtk-config is in path, the directory
where GTK+ libraries are installed (returned by
'gtk-config --libs' command) is in LD_LIBRARY_PATH or
equivalent variable and GTK+ is version 1.2.3 or above.

i used the command
gtk-config --libs --version and the return is :
1.2.10
-L/usr/lib -L/usr/X11R6/lib -lgtk -lgdk -rdynamic -lgmodule -lglib -ldl -lXext
-lX11 -lm

I have the version above 1.2.3
I configured the LD_LIBRARY_PATH, but the error persist.
Where i configure it correct.

Thanks,

Alex Rodrigues