ROOT not working

I have a macbook pro with OSX 10.7.3, I installed root with configuration

./configure macosx64 --prefix=/opt/local/root make sudo make install
I also added the bin folder to PAT. When I use terminal and enter command

it recognizes the command but nothing happens. On top of that I compiled and linked the surface example that uses TGraph2D. When I run it no plot is shown.
Any help is appreciated, Thanks.


is that solved ?
what do you get when you type “which root” ?