[Freeswitch-users] how to manipulate sip headers in Freeswitch

[sam]

hi,
i am new to free switch and am trying to connect it to a call out system. But
whenever i make the out call, the remote server says "too many Allow events" and
the support representative says i need to remove the Allow-Events.

does any one know how to manipulate or remove the "allow-event" part of the sip
header ?

My current allow events are 
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO, REGISTER,
REFER, NOTIFY, PUBLISH, SUBSCRIBE

Allow-Events: talk, hold, presence, dialog, line-seize, call-info, sla,
include-session-description, presence.winfo, message-summary, refer

and the server has problem with Allow-Events. they only want talk and hold. 

thanks.
-sam