macro settings greyed out

Hello Experts,

I need your help!

I am using the excel 2010 on Win 7. I found I cannot change the macro security settings, all of them are greyed out.

Interesting thing is I can record the macro and run it, but I cannot run any macro when I import it from outside. Currently the system setting for macro is "Disable all macros with notification"

Please help me out.

Edward