Unregistering project psi shared application timer job failed

Hi All,

I'm trying to create a SharePoint Project Web App service application and it's not creating the Proxy application and won't let me delete the project service. Here's the error I get when attempting to delete the service application:

05/01/2012 21:07:50.10 w3wp.exe (0x10EC)                      0x1480 SharePoint Foundation         Runtime                      tkauUnexpectedSystem.NullReferenceException: Object reference not set to an instance of an object.    at Microsoft.Office.Project.Server.Administration.PsiServiceApplication.get_ServiceAppTimerJob()     at Microsoft.Office.Project.Server.Administration.ProjectPSISharedApplicationTimerJob.Unregister(PsiServiceApplication psi)     at Microsoft.Office.Project.Server.Administration.PsiServiceApplication.Unprovision(Boolean deleteData)     at Microsoft.SharePoint.ApplicationPages.ServiceApplicationDeletePage.OkButton_Click(Object sender, EventArgs e)    at System.EventHandler.Invoke(Object sender, EventArgs e)     at System.Web.UI.WebControls.Button.OnClick(EventArgs e)     at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)     at System.Web.UI.Page.RaisePostBackEvent(IPostBackEven...f52b5008-3e11-48e9-bc5a-d0592a7057dd
05/01/2012 21:07:50.10*w3wp.exe (0x10EC)                      0x1480 SharePoint Foundation         Runtime                      tkauUnexpected...tHandler sourceControl, String eventArgument)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)f52b5008-3e11-48e9-bc5a-d0592a7057dd

Any ideas why it's failing, there are no Site Collections assigned.