i created an endpoint in sqlserver and able to access from anysystem.
My problem is now working fine in all machines except in windows xp machines.
if we like http://<servername>/helloworld?wsdl
in windows xp, it keeps on asking the id and password in ie. but in other windows 2000, it's does n't ask for anything and it's working fine.

any idea how to get it resolved and make it work in xp...

thanks