I am developing a simple web application that lets user upload files to the PDM vault. The application page that uploads the file works without any issues when run through Visual Studio but when the code is deployed to the server the following line simply hangs up:

EWRFolder = (IEdmFolder6)vault.GetFolderFromPath(strEWRFolder);

EWRFolder.AddFile(0, strFile, EWRDocumentName, 0); //this never completes

The web application is running on Windows Server 2008 and uses Network Service as the app pool identity. I have been stuck on this for weeks now, please help.