[Ekiga-list] Message "Registration failed: Timeout"

[Roman Polach]

>>
>
>11:22:01.514920 IP 10.0.0.204.5064 > ekiga.net.5060: SIP, length: 572
>
>I see no answer.
>
>Are you sure your rtr_wlan0 is not rewriting the SIP PDU through the SIP
>conntracker module or similar?
>--

No, the only conntracker module it uses is ftp_conntrack.
Are there any other kernel options I could to check?
(kernel 2.6.16-gentoo-r7)