SEPM 11.x Live update Error Code 1835

Error: "LU1835: Connection to the LiveUpdate server failed" received when i have run live update on SEPM 11.0.7400.1398.

SEPM Version : 11.0.7400.1398

I have follow below articles but problem not solved.

http://www.symantec.com/business/support/index?page=content&id=tech101807