having problem on connecting 3cx voip client using sipgate

[ee23rl]

hello Sir/Madem,

I am trying to connect 3cx PBX for windows to connect to any of the SIP client software using sipgate gateway.So the sipgate gateway is free. Ans I have a username and password for accessing the gateway. Can anyone help me to do some settings on my 3CX PBX server and client softwares.
My phone no is 07877411808
And my e mail address is :[email protected]

Thanks,
Ratheesh