网上下的stata11和12好多命令都不能用，用findit winsor也不行，求问是怎么回事？
unrecognized command:  Winsor not defined by Winsor.ado
r(199);
unrecognized command:  Pwcorr not defined by Pwcorr.ado
r(199);
unrecognized command:  Reg not defined by Reg.ado
r(199);