asterisk users - May 2003 - Would moving asterisk from behind NAT fix iconnecthere problems?

Hi All,

Outbound Iconnecthere calls work without any problem but Inbound
calls are very intermittent. It seemed to work for a week or so
but over the past week 99% of inbound calls are dropped to ICH 
voicemail.

Would moving the Asterisk box to a public IP resolve the problem
or is it just an ICH/Asterisk problem?

I am registering against natrelay.deltathree.com. asterisk -vvvc
shows an "unable to determine sequence number from ''"
message.
The box is running the CVS build from yesterday.

Thanks,
Nathan.