[webkit-dev] debug the webkit with visual studio 2005

HI: I am an neebie, i want to debug the webkit with visual studio 2005.now i have finished the steps: 1、 *Installing the Developer Tools* <http://webkit.org/building/tools.html> 2、*Getting WebKit* <http://webkit.org/building/checkout.html> 3、*Building WebKit* <http://webkit.org/building/build.html> now i want to run webkit, i open a Cygwin Shell and type this command in the shell WebKit/WebKitTools/Scripts/run-safari --debug but the result is: ERROR:couldn't determine installed safari path setting enviroments for using microsoft visual studio 2005 x86 tools How can i debug the webkit step by step? thank you!