I have a important problem.yesterday ago,I can use my c::b good,but today,I can't run this problem.my os is windowsXp sp2. since ago,I 've been install c::b rc2,and I've been install c::b nightly builds everyday for test.my c::b rc2 can run,but my nightly builds can't run,I don't know why? At first I copy all files in c::b rc2 directory,and paste into a new directory.then I copy all files in c::b night build directory(the files have been unzip) into the same directory.but why the programee can't be run.could you give me a answer ?