You need the same OS as you asked here, nothing has changed: Latest OS: 8310 188.8.131.52/184.108.40.206 (English + EastAsia languages)
The routine questions:
1) Did you follow the directions exactly as posted?
2) Did you follow those directions IN the order as written?
3) Did you install (double-click) on the *.exe file which you downloaded?
4) Did you delete the vendor.xml file?