Showing the calling SIPDOMAIN from SIP provider/proxy?

Hi,

I just started playing with asterisk using FWD as the SIP proxy. Everything works nicely and the quality is great. However, I have one problem(so far).

If the calling party is "513@pulver.com" and I use a Dial() call, my soft phone(Windows messenger) see it as "513@192.168.1.3" where 192.168.1.3 is my asterisk server.

Can I pass around the originating domain to the soft phone ?

thanks for any help in advance.