Dear Gurus
I have a form in infopath 2003 using mangaged code written in C#.NET. On clicking a button value from a Access database is populated in a textbox.the form was running well before when my hard drive crashed. After recovery and again installing the VS.NET 2003 with all its requirement I have got a problem. The problem is when i click on the button it throws an exception saying that System.Security.SecurityException Request Failed and ..... And then it points to the line number of the code where it actually makes connections and gets values from the database. On running the form the following message is shown. I give the form a full trust and sign with a digital signature.

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It is a very strange situation for me and I am still unable to resolve it. Please help me in this regard.
thanks in advance