tap interface, bridging and freebsd 5.3

[Andrea Riela]

Hi folks,

I would test openvpn with bridging options, then I need a tap interface.
I've compiled my kernel with
device	tap
then 'kldload if_tap' via command line, but I don't see a tap interface 
in /dev or with ifconfig ...

Obviously:
tcpdump -i tap0
tcpdump: BIOCSETIF: tap0: Device not configured

Could you help me?
Thank you very much
Regards
Andrea