Store uri-user and replace the To with that number

Once again, I can't seem to get my HMR to work properly.  This seems like it should be pretty straightforward, but it is only removing the uri-user out of the To header and I want it to replace the user with what is in the in the URI.  Let me know if you can help.  I feel like I have one parameter off...

 

sip-manipulation
        name                           Out911

        description                    

        split-headers                 
        join-headers                  
        header-rule
                name                           uri_store
                header-name                    URI
                action                         store
                comparison-type                case-sensitive
                msg-type                       request
                methods                        Invite
                match-value                   
                new-value                     
                element-rule
                        name                           uri_store_user
                        parameter-name                
                        type                           uri-user
                        action                         store
                        match-val-type                 any
                        comparison-type                pattern-rule
                        match-value                    ^\+{0,1}\d+$