xslt compile error : The remote server returned an error : (401) Unauthorized.

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C#

ASP.NET

C#4.0

MVC

C#3.5

i am using xslCompiled Transform to do transform .
In the Load method i am trying to load an xslt from local by the xslt has reference(href like href="www.abc.com/xslt/xslt1.xslt") to an xslt which i am trying to download from the directory of another service for which i have enabled windows authentication .

Now when it is trying to download the external xslt i am getting xslt compile error : The remote server returned an error : (401) Unauthorized.

Can someone plz help on this . Thanks in sdvance