my product can not be updated and it told me that my licanse is expirad (my lincase 3 years from 07/02/2011 to 06/02/2014

You might have installed a trial ware and forgot to update the license?

when did you get the slf file?

please check this document

Can Symantec Endpoint Protection 12 for Small Business (SEP 12 for SB) Trialware Edition be migrated to Licensed version, without uninstalling the existing Trialware setup

If you still have license issues you can call the Licensing department at 1-800-721-3934 and select option 2, or visit the Licensing Portal.

https://licensing.symantec.com/acctmgmt/index.jsp

Hello,

Check the Symantec KB's on Question on "How to ..."

1) How to install a license in Symantec Protection Center Small Business Edition

http://www.symantec.com/business/support/index?page=content&id=TECH91894&actp=search&viewlocale=en_US&searchid=1300190538172


2) Can Symantec Endpoint Protection 12 for Small Business (SEP 12 for SB) Trialware Edition be migrated to Licensed version, without uninstalling the existing Trialware setup

http://www.symantec.com/business/support/index?page=content&id=TECH94716&actp=search&viewlocale=en_US&searchid=1300190538172


3) How to migrate from the Symantec Endpoint Protection 11 trial version to the licensed version

http://www.symantec.com/business/support/index?page=content&id=TECH91101&actp=search&viewlocale=en_US&searchid=1300190538172


4) How to Register a Serial number to download new license file in Symantec Endpoint Protection Small Business ?

http://www.symantec.com/business/support/index?page=content&id=TECH95678&actp=search&viewlocale=en_US&searchid=1300190538172