removing + from From user part

I am trying to remove the + from my fram address user part <sip:+9999999999@acme.com>;tag=06c8ca19afee3156c53c614e00  with the following.header-rule
                name                           deletefromplus
                header-name                    From
                action                         manipulate
                comparison-type                pattern-rule
                msg-type                       any
                methods
                match-value
                new-value
                element-rule
                        name                           deletefromplus
                        parameter-name                 deletefromplus
                        type                           uri-user
                        action                         replace
                        match-val-type                 any
                        comparison-type                case-sensitive
                        match-value                    [+]
                        new-valuehowever the + is still there.  Any suggestions? Thanks