[Users] help with configuring openser on vmware

I have ubuntu running on a vmware server on my windows machine. I have installed openser on ubuntu. The network connection is bridged. I have set listen=vmware's ip in openser.cfg When I start openser, it gives me a warning fix_socket_list: cannot resolve (ip addressin cfg) I dont know if this is the cause of the problem, but I cannot register a minisip client with the openser server. The client runs on my windows m/c ,so its url is client@windowsip and its sip proxy address is openser's ip. Ethereal shows me that the client is sending a request:register but it seems to be getting a request:register back as well whereupon the client replies with a icmp dest unreachable. I have no experience with voip, and would greatly appreciate any help.