[Serusers] Too many hops...

Hi, I have installed a ser on my one linux-machine in a LAN which also has an other Linux-machine running DNS server. SIP server has a domain like, sip.ur_net.lab and its ip address is 10.3.0.1 i can resolve the sip.ur_net.lab to 10.3.0.1 on the this sip machine by running command dig sip.ur_net.lab at the command line. Now i have connected two windows hosts to same network and installed SIP user agents on these windows hosts. now in client when i use my sip domain and sip proxy as sip.ur_net.lab, the server does not register me. Also on windows hosts i can resolve sip.ur_net.lab to 10.3.0.1 by using ping sip.ur_net.lab. But in windows host when i use 10.3.0.1 as my sip domain and sip proxy then all things go ok and we can talk through sip user agents. Do i have to add some special entry in DNS server for username(a)sip.ur_net.lab to resolve to username(a)10.3.0.1 or any other suggestion. Thanks. -ajeet. -- Ajeet ajeetnk(a)fastmail.fm -- http://www.fastmail.fm - Accessible with your email software or over the web