[Freeswitch-users] freeswitch 1.7.0: transport=tcp - doesn't seem to work

Hello, I'm using freeswitch 1.7.0 and I'm trying to use transport=tcp on one side (big packets) and udp on the other side (extra data is filtered with copy_custom_headers=false). However, when the udp-side (calling side) finished call-setup with sdp, no ack on the invite 200 OK is sent to the tcp-side. Are there problems with tcp or may I be doing something wrong? The tcp-side is using a gateway which is configured with tcp. Thanks, Michel