Problem when intergrate openfeint in unity3d

Hi folks,

i want to make openfeint leaderboard using unity3d...now am using unity 3.2 and openfeint 2.9.1....i have build correctly as well as what they told in openfeint unity support readme.txt and open feint web link.

now i'm getting error as ,

"Command /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 failed with exit code 1"

wat am doing wrong??

'm working with ios 4.2... i have tried and corrected well all unity player settings and set the target ios platform "from 3.0 to 3.2" am getting the same error...can any one point out what am doing wrong..i have tried this from past one week...

thank you.