hi Guys ,
will some one help me out here to setup my SIP account

i have an username say :tom@voip.sip.com
and password say :123
and my sip server is say voip.sip.com
and proxy server is the same i.e voip.sip.com

Now in the n900 sip account menu

i have filled it out like this

username : - tom@voip.sip.com
password :- 123

[Advanced settings]

username : ?
Outbound proxy: ?
discover public address is checked
loose routing is unchecked
keep alive mechanism set auto
kep alive period set to auto
Auto detect STUN checked


with the above settings i m not able to sign in.

I have also tried varios combinations like
username : tom
password : 123
[advanced settigs

username : tom
outbound proxy : voip.sip.com
rest all r the same

I use the same setting in my nimbuzz cleint(PC) and i m able to make calls
What is that i m doing wrong here?

Thank you
TOM