[cisco-voip] IP Communicator over VPN

[Constel]

Hi

I'm getting some troubles with IP Communicator over VPN. The users complain
they can connect on the VPN Server and register their IP Communicator, but
are not able to make calls. When the New Call button is pressed nothing
happens. It seems it could not pass skinny signaling over VPN.

That problem has began after I changed the VPN server. It was a PIX, now
it's an ASA5500.
I could not see any difference between the PIX and ASA configuration.
CallManager version 4.1(3)sr3c
IP Communicator 2.0.2 and 2.1.1
VPN Client 4.6 and 5.0

Has someone seen that before?
thanks in advance
--
Marcelo Zilio