Endpoint Protection

Hi
  I am updating live update daily is not updateing so what is the problem in eventlog error live upadte is noncritical unable to install so how to fix this problem. iam useing symantec end point protection manager 15.0 ver as well as end point protection end user client also 15.0

is your liveupdate showing date dec 31 2009?
if so then it seems to be an issue with liveupdate , symantec working on it.
https://www-secure.symantec.com/connect/forums/sepm-update