Unit Test error XCode 3.1 (Beta)

FROM : Rakesh Vidyadharan
DATE : Fri May 02 13:45:45 2008

I am a beginner with Cocoa and XCode.  I am trying to develop a simple 
game for iPhone/iPod Touch and OS X.  To get started I created a 
simple framework that represents (code only for iPhone) the data model 
and logic engine for the game.  I am now writing some simple unit 
tests for the core framework.  I went through the unit test 
documentation provided by Apple to set up my test.  However, I could 
not get very far with the unit test.  It seems to be an error in 
invoking the framework rather than an issue with my code (mainly 
because I do not see any output related to test case execution).  The 
following is the error I get:

"error: Failed tests for architecture 'i386' (GC OFF)" at line 376 in 
RunPlatformUnitTests.include.

Can someone point in the right direction as to the cause of this 
error.  I am assuming this has something to do with settings for my 
Test target.

Thanks
Rakesh