Header X_SPAM_REPORT

[Andr� L�onard]

SpamAssassin 3.2.4 on windows

I receive some mail via a mail relay running SA (DynDns). How to run my own SA 
keeping the DynDNS X_SPAM_report available ?
How to rename the already included header BEFORE adding the new one ?

I tried this : 

remove_header all Report
add_header all LocalReport  _REPORT_

but no success,

Thanks.