Passing credentials across 2 webservice

[prakashsha]

I've 2 webservice. (webservice1, webservice2). and one winform..
The winform calls the webservice1 as follows and sends teh currentLogon BY
USING default credentials and it works fine.
localhost.Service1 a = new localhost.Service1();
a.Credentials = System.Net.CredentialCache.DefaultCredentials;
MessageBox.Show(a.HelloWorld());
when The webservice1 calls webservice2 with the following credentials. The
credentials are not passed?
localhost.Service2 ser = new localhost.Service2();
ser.Credentials =
System.Net.CredentialCache.DefaultCredentials;
Instead of logon , I get empty values.. why the credentials are not passed
across two webservice..???