modify Max-Forwards value

Our MSC sends a OPTIONS message with Max-Forwards=0. So our SBC send a 483 Too Many Hops. So it's just links between our MSC and SBC.

 

We would like to test link between out MSC and another session-agent. I would like to change Max-Forwards value in out MSC message.

 

I use this HMR but it's not working:

 

sip-manipulation
        name                           test483
        description
        split-headers
        join-headers
        header-rule
                name                           header483
                header-name                    Max-Forwards
                action                         manipulate
                comparison-type                pattern-rule
                msg-type                       any
                methods                        OPTIONS
                match-value
                new-value
                element-rule
                        name                           maxforw
                        parameter-name
                        type                           header-value
                        action                         replace
                        match-val-type                 any
                        comparison-type                pattern-rule
                        match-value                    0
                        new-value                      70

 

 

 

Thanks if you hava any idea