Error installing matplotlib on cygwin

I am trying to install matplotlib on cygwin. When I try to do so it gives me the following message:

GTK requires pygtk

GTKAgg requires pygtk

running build

running build_py

running build_ext

building ‘matplotlib._agg’ extension

gcc -fno-strict-aliating -DNDEBUG -g -03 -Wall -Wstrict-prototypes -Iagg23/include -Isrc -Iswig -I/usr/include/python2.4 -c src/agg.cxx -o build/temp.cygwin-1.5.18-i686-2.4/src/agg.o

C:\cygwin\bin\python2.4.exe (260) *** unable to remap C:\cygwin\bin\tk84.dll to same address as parent(0x18C90000) != 0x191A0000

1068 [main] python 1216 fork_parent: child 260 died waiting for dll loading

error: Error


How can I fix this?

-Alex Mont