Error: Unable to initialize gtk, is DISPLAY set properly?

-bash-4.1$ make

find -name "*.o" -exec rm {} \;

rm -f window -R

g++ -c window.cpp `wx-config --cxxflags`

window.cpp: In member function ‘void MyFrame::OnAverageImage(wxCommandEvent&)’:

window.cpp:469: warning: name lookup of ‘r’ changed

window.cpp:438: warning: matches this ‘r’ under ISO standard rules

window.cpp:450: warning: matches this ‘r’ under old rules

g++ window.o -o window `wx-config --libs --gl-libs` `wx-config --cxxflags` -Wall -Wno-unused -Wno-reorder -O3 -fomit-frame-pointer -fforce-addr

-bash-4.1$ ./window

Error: Unable to initialize gtk, is DISPLAY set properly?

-bash-4.1$

I am trying to connect to college server bert where I am running wxWidget application related to image processing.

but when I run (./window )commands it give me error above.

I am runing OS X maverick I. I need urgent help .

Arshad