Full protection of excel file

Hello,

I want to fully protect my excel file so I have done the following:
Protect each worksheet with password.
Protect VBA project with password.
Protect workbook with password.

So far everything is fine.
But when I want to run macros the sheets can't be protected.
So I wrote a macro to disable and a macro to enable the protection.
Made a button which once clicked runs:
the macro to disable protection
the macro which I want to work
the macro to enable protection

Now I can run the macro and still have my file protected.
The problem is that now anyone can run the macro to disable the protection without knowing the password!

Does anyone know a solution for this?

Best regards,
Trowa