iHMR to add 0

Hi

I have my setup as CUCM <<->>SBC<<->> SERVICE PROVIDER

The service provider sends calls in 27xxxxxxxxx format , the CUCM wants to me to strip 27 and add 0,

I also have a LRT with the ranges that route to the CUCM in the 27xxxxxxxxx format

My LRT is as follows :where C-CUCM is the Session Group for the CUCM

<localRoutes type="range" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

<route>

<user type="range" rangeEnd="27xxxxxxxxx" rangeStart="27xxxxxxxxx"></user>

<next type="regex">!^.*$!sip:1@C-CUCM!</next>

</route>

I have added this to the in-manipulation on the CUCM Session Agent but it does not strip the 27 and add 0