[asterisk-security] Sip Cryptated

[Blobblio [Yahoo!]]

Hi....I'm italian..

I have a problem with asterisk.
In my configuration there are two client Sip Minisip in a Lan with a 
server Asterisk 1.4.2..
in this configuration there are not problem if i do a call,
then if the call is cryptated trough a certificate 512 or 1024, the 
reported warning on Asterisk's debug is :: WARNING [6578]: 
chain_sip:5119 process_sdp : Error in codec and the call is terminated
you have a supposition??