minisip point to point TLS problem

[larrykind]

Hi everyone,
I'm trying to keep two minisip instances in TLS point to point
communication, without proxy in the middle ( I'm using the trunk 3351
version). The calling procedure works fine, minisip tells me the call
is "secure", so the certificates and keys I made with openssl seems to
work.
Effectively when I go analyze my ethernet traffic with ethereal the
packets seem to be encrypted (the two minisip have the same settings),
but it tells me also that NO packet goes through the 5061 port!
Everything goes through 5060 port, SIP signalling also.
Furthermore I tried to call the other side minisip at 5061 port
(something like bob at 192.168.xxx.xxx:5061), but It doesn't work, the
receiver doesn't signal there is an incoming call, even if ethereal
signals me that effectively an "INVITE" packet passed through the 5061
port. The INVITE on 5061 is refused it with an "ICMP - port
unreachable" message. Could someone explain me what is my mistake?
Maybe I need to use a proxy/registrar?
Thank you very much.

Larry