If you want to use PSI USB Key correctly, make sure that you follow these steps:
1.Make sure to Keep your PSI USB Key connecting to your PC.
2.Install USB Key driver on your operation system.
3.Download the file and unzip it.[How to unzip?]
4.Run "PSI CA CHECK.exe" program and click "Repair All" button.
5.Click "Refresh" button in your current Internet Explorer window.
6.Input your PIN code for your PSI USB Key, and login to PSI System.
PSI CA FAQ for your references: PSI_CA_REF_CN     ,PSI_CA_REF_EN