Thanks for your reply Jerry,

Yes, the further information you provided is very important. That remind me
of the potentitial cause from forms authentication protection on pages or
resource in the application.

So you're using Forms authentication, and by default deny  user="?",
correct? Is the application hosted in IIS on both machine? Normally asp.net
forms authenticaction won't affect those static files(such as css ,
jscript...) because only those ASP.NET documents(aspx, ascx ..) will be
forwarded to ASP.NET runtime for processing. However, you can check on the
server to see whether the IIS extention mapping has bee  changed that those
static files will also be processed by ASP.NET runtime.

For testing , you can also first turn off forms authentication protection
on all page(set allow users="*") to see whether the style sheet can be
accessed correctly.   Also, since those Theme files are for displaying
only, I suggest you consider add a rule (through <location> ) to allow all
users access for the Theme folder. e.g.

<location path="App_Themes">
        <system.web>
            <authorization>
                <allow users="*"/>
            </authorization>
        </system.web>
    </location>

If you have any other findings, welcome to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead

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