Problen in using Open Flash Chart

Hi All

i am trying to use Open Flash Chart

i tried this as instracted in this link

http://github.com/pullmonkey/open_flash_chart/tree/master

bat at finally i got the following error

undefined method `open_flash_chart_object' for #<TestItController:
0x398df5c>

At presnet i cant understand what to do. please help me to solve this
problem.. please