[Freeswitch-users] FS <-> SKYPE with G729. how to set annexb=no ?

Hi there! I know that it should be simple but when i add<action application="export" data="sip_append_audio_sdp=a=fmtp:18 annexb=no"/> nothing happens... I didn't see fmtp:18 annexb=no in SDR of B-led the callflow: Skype --> FS ----G729a---> VOIP Please advice Thanks.