Bentley Lifecycle Server LCS 'Class not registered on local machine'

Dear Friends of Colleagues,

When I tried to connect the Bentley LCS Explorer from the client PC, it prompt that 'Class not registered on local machine'. But if login directly from the server, it works normally. Did I skip some step to connect from the client ? Or did I miss some configuration connecting to the server ? Btw, the version that I use is 08.11.10.07

Please someone helps me to resolve this.

Regards,

Refanto