JDBC Integrated Windows Authentication

I have Microsoft SQL 2005 Express on my computer. I am trying to
connect to it through JDBC using Integrated Authentication. I can get
it to work in a traditional java application, but when I try to make it
work with a servlet, I get this error:

com.microsoft.sqlserver.jdbc.SQLServerException: This driver is not
configured for integrated authentication.

Can this not be done in a servlet? I am using the same jar in my
classpath as the traditional java app. Thanks for replies.

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