InfoPath Dev

I have the anwser http://msdn.microsoft.com/fr-fr/library/aa813327.aspx

Hi ! I would like to develop infopath 2007 forms using Visual studio 2008.Professionnal Edition. When i try to create a infopath template have this error: "This template attempted to load an untrusted component 'Microsoft.Office.InfoPath.vsta, Version =12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c, ...