Which is the version of browser you are using?
Symantec Protection Center has the following browser requirements:
Browser
Internet Explorer 7 or 8
Browser settings
Enhanced Security Configuration disabled
Internet Explorer 8: run in Compatibility Mode
You may also need to be aware of the following product-specific requirements:
Symantec Endpoint Protection Manager
If you use a limited administrator account to register with Protection Center, the account must include reporting rights. Otherwise, the registration fails.
To view the product console without scrolling, you need a display resolution of at least 1280X1024.