problem installing gimp

[Michael Thon]

Hi - I get an error during the config phase of the gimp2 port.

sudo port install gimp2

Here is the end of the output:

checking for GTK+ - version >= 2.4.4... 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: Test for GTK+ failed. See the file 'INSTALL' for help.

I go have the gtk2 package installed.  Any ideas what is wrong?
thanks again
Mike