[Freeswitch-users] Set sip_from_user with channel variable?

My SIP provider requires me to pass the caller ID number using the SIP from header and they ignore the value in the Remote Party ID field. Is there a way to set a channel variable that will impact the SIP from header? I've tried setting sip_from_user, sip_auth_username, user_name to the caller ID, but FreeSWITCH keeps defaulting to "FreeSWITCH" as the username. My sip profile simply looks like this: <include> <gateway name="myprovider"> <param name="proxy" value="THE_IP"/> <param name="context" value="public"/> <param name="register" value="false"/> </gateway> </include> Thanks!