Cisco ATA (SPA122) not registering

[LUALST]

I've deployed an spa 122 before but this one is acting differently today- or maybe i did something special but forgot what it was!

I'm getting this in trace: (Running R9 Server edition)

344523132mS SIP Reg/Opt Rx: phone
REGISTER sip:192.168.100.10 SIP/2.0
Via: SIP/2.0/TCP 0.0.0.0:5068;branch=z9hG4bK-6292c9ca
From: "199" <sip:199@192.168.100.10>;tag=c8f9341effd97096o0
To: "199" <sip:199@192.168.100.10>
Call-ID: 21f8804a-7580ba2a@0.0.0.0
CSeq: 43612 REGISTER
Max-Forwards: 70
Contact: "199" <sip:199@0.0.0.0:5068;transport=tcp>;expires=3600
User-Agent: Cisco/SPA122-1.3.3(015)
P-Station-Name: ;mac=00e16db64246; display=""; sn=CCQ1820020Z
Content-Length: 0
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: replaces

I think the problem lies with the italicised section, as it's trying to go via nothing.

It's on TCP at the moment as i was seeing if that made a difference.

i cant find the field that i would have to fill out to not get 0's

any ideas?

Ta