I installed HELM 4 upgrade to my server and lost ability to attach .mdf file located in the App_Data folder. I moved to a new server and am having the same issue. Exception Details: System.Data.SqlClient.SqlException: User does not have permission to perform this action. I need RameyJane.com DNN install to pass the Database check when using an .mdf file in the App_Data folder. TerriCavoli.com/Albums.aspx is having the same issue, throwing the exception listed above. I can attach an .mdf file and create a user. Using an attached db works fine. The install is sqlExpress. Some of the things I've looked at: NT Authority/Network Services can log onto SQL server, read/write in the website folder. Using the Surface Configuration utility, I've checked for allowing remote and local connections. (It was already set as I understand this to be the default for the Express version) When I try to run http://terricavoli.com/albums.aspx I find the following in the Application Event Log Source: ASP.NET 2.0.50727.0 Category: Web Event Type: Warning EventID: 1309 User: N/A Computer: CA207 Description: Event code: 3005 Event message: An unhandled exception has occurred. Event time: 7/3/2009 1:21:33 PM Event time (UTC): 7/3/2009 6:21:33 PM Event ID: 326052e98d844710953f9c0393162cc8 Event sequence: 49 Event occurrence: 24 Event detail code: 0 Application information: Application domain: /LM/W3SVC/96687/Root-4-128910717577472774 Trust level: Full Application Virtual Path: / Application Path: E:InetpubTerriCavoli.comwww Machine name: CA207 Process information: Process ID: 3676 Process name: w3wp.exe Account name: NT AUTHORITYNETWORK SERVICE Exception information: Exception type: TargetInvocationException Exception message: Exception has been thrown by the target of an invocation. Request information: Request URL: http://TerriCavoli.com/Albums.aspx Request path: /Albums.aspx User host address: 78.46.96.245 User: Is authenticated: False Authentication Type: Thread account name: NT AUTHORITYNETWORK SERVICE Thread information: Thread ID: 1 Thread account name: NT AUTHORITYNETWORK SERVICE Is impersonating: False Stack trace: at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Web.UI.WebControls.ObjectDataSourceView.InvokeMethod(ObjectDataSourceMethod method, Boolean disposeInstance, Object& instance) at System.Web.UI.WebControls.ObjectDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) at System.Web.UI.WebControls.BaseDataList.GetData() at System.Web.UI.WebControls.DataList.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.BaseDataList.DataBind() at System.Web.UI.WebControls.BaseDataList.EnsureDataBound() at System.Web.UI.WebControls.BaseDataList.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)