Yingtonggao, try J River Media Center. It costs $50 but is well worth it. The other thing you want to do is disable kmixer in XP or upgrade to Windows 7 if possible.
Running JRMC on Win 7 here, optimized, into the DP-777, with superb results.
Running JRMC on Win 7 here, optimized, into the DP-777, with superb results.