Error when trying to search for updates via tray icon

Hello.

I'm installing SEP SBE 2103 Cloud on 14 computers. All of them using Win7 x64 and all of them give full "green lights" on both clients and hostedendpoint webpage.

Installation process goes well on all machine but some of them have issues when clicking on the "check for updated software" link when right clicking on the tray icon.

The message says: Cannot start LiveUpdate. Please reinstall Symantec.Cloud and try again.

When i click on "update definitions" on the client main page, the liveupdate process starts and finishes well.

I've tried uninstalling and reinstalling as suggested but nothing.

Any clues?

Thanks in advance.

Mauro.