[Serusers] Using Sipsak to register

[Cameron Beattie]

I am struggling to understand the syntax of sipsak. I want to use it to 
register against a proxy. I enter the command:
sipsak -U -C sip:1234 at 192.168.0.5 -a password -s sip:1234 at 192.168.0.5
I get the message error: REGISTER Contact uri doesn't not contain sip:, *, 
or is not empty"
If I enter the command
sipsak -U -s sip:1234 at 192.168.0.5 -a password
then the register message gets sent but with a contact of sip:1234 at 127.0.0.1

Could anyone help me with the correct syntax to use?

Regards

Cameron