Run MS Project

I use Attain 3.01.A and I’m trying to open MS Project with the following code : CREATE(Proj); Proj.ActivateMicrosoftApp(4); CLEAR(Proj); with proj = Automation (‘Microsoft Project 9.0 Object Library’.Application) With other arguments (3= Excel,2 = Outlook) the function runs without errors, but with argument 4 I get the following error : “An unexpected error occurred with the method”. Has anyone a solution for this problem ? Thanks in advance