Making Data Router calls from a custom WebPart

John, Im hoping you can help out here since I know youve been doing Infor10 implementations but...

Has anyone developed a custom webpart for Workspace and made any data router calls to return data? 

Im making an HttpWebRequest from the code to the direct url (http://server/servlet/router/data/erp?....). im getting an invalid session message saying that a session is already created for the current user. There was some suggestion that AppStudio may be needed as it has access to the BIContext however I cant locate any documentation or even information on what AppStudio is or if its installed. 

Anyone gone down this path before?