Tell me too if you solve. Mine works consistently and now worried it wouldn't work elsewhere.
PS: My web service webconfig file, authentication mode="windows", allow users="*" if makes a difference.
Cetin

>Cetin:
>
>Thanks for your helpfulness.(**** here are some stars!).
>
>My feeling is that it is something peculiar to my using a server as a workstation!.
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>When I make a web reference, it will not allow an ip address. It will only accept tiger2, with and without its associated domain. It then asks for username and password. I have tried using the same combination I am currently logged in with or using an entirely different log in name. Sometimes this appears in the security event viewer as a successful login, sometimes not. I have tried it with and without anonymous access turned on in IIS - once this showed up as a login.
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>What I do not see in the security event viewer are failed logins corresponding to all the 401 errors.
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>Nothing makes too much sense now
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>I have downloaded an update for the compact framework but I have not yet found out how to install it!
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>All the best,
>
>Godfrey