Signing macros in templates

[zeneri]

I created a template for an invoice with a macro to set the invoice number on printout. I signed the macro with a certificate I created with selfcert.exe.

The macro runs well. But when I set the macro security level to high the following happens:

1. When creating a new document based on the invoice template the macro is activated.
2. When I save the document and open it again the macro is not activated.

Any suggestions how to manage that the macro works after saving the document and opening it again?

I'm using office XP.