help please ...... going nuts over this

My code returns error on the maindatasource call, and I dont seem to see the problem.

public void FormEvents_Load ing(object sender, LoadingEventArg s e) {

XPathNavigator myRoot = MainDataSource. CreateNavigator ();



ProfileService. UserProfileServ ice profileService = new ProfileService. UserProfileServ ice();

profileService. UseDefaultCrede ntials...