[Freeswitch-users] Dropping the Subject: header

Hello all, we are developing a custom app that will require sending a Subject: header (with a specific value) with the initial invite to trigger additional calling features and behavior. What we're finding when we send the Invite, is that FS is dropping the Subject: header and continues normal call processing. Is there a configuration parameter that allows the header to pass through FS? I submitted a SIP trace in pastbin and the reference number is 14853. Mike