Lost on SIP w/ VLAN problem

Dear All,
I am running SuSE 10.0 with vlan-1.8-27. I have all my normal services such as dhcpd, named, tftp, etc. all working on the vlan interface… But asterisk does not seem to listen to it for sip packets. I see the tagged sip registration packets headed towards the asterisk ip… but the sip debug shows nothing. I even attempted the bindaddr setting to the ip of the vlan interface, but no go… Any ideas??

Thanks! -Cheers, Peter.