Security problem to consume WCF WebService

Hi everyone,

I have this scenario:

I built a package to consume a webservice. The package uses a .NET 3.5 library with a clientService to a WCF WebService with basicHttpBinding. There was not problems in development testing locally, but when I had deploy to a server I get an exception System.Reflection.TargetInvocationException.

After a lot of ressearch I solve the issue putting the execution user of the package in the Power Users group on the server.

I need to know exactly which permission I have to grant to the user and how I do that.

Anyone have seen this before?

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guilhermeando