Successfully installed DNN4.4.1 with all modules.  Attempted to install ByDesign's Advanced Email Manager; installed BDPDT module without error.  Up to this point the File Manager operated properly.  I then installed Core Module without error.  However, the following message appeared when selecting the Admin and Host File Manager:

Error: File Manager is currently unavailable.
DotNetNuke.Services.Exceptions.ModuleLoadException: C:\DNN437Install\Admin\Files\FileManager.ascx.vb(324): error BC30456: 'Key' is not a member of 'System.Web.UI.WebControls.TreeNode'. ---> System.Web.HttpCompileException: C:\DNN437Install\Admin\Files\FileManager.ascx.vb(324): error BC30456: 'Key' is not a member of 'System.Web.UI.WebControls.TreeNode'. at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile) at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) at System.Web.UI.TemplateControl.LoadControl(String virtualPath) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) --- End of inner exception stack trace ---

I've notified ByDesign Support for assistance.  In the meantime does anyone have experience with ByDesign's Advanced Email Module (Suite edition) who might shed some additional light on a solution?

Regards,

Jack

Sebastian
Do you know if someone is going to update the package available to include the missing dll files?  This would seem the easiest thing to do?
Antony

I very much appreciate your attention to this matter and for your great response.  Unfortunately, I copied the file, DotNetNuke.DNNTreeNavigationProvider.dll, as you suggested.  The problem remains.  I am baffled as to why the Advanced Email Manager Core module appears to be the cause.  The File Manager works properly up until I install the Core module.  The other cause for consern, of course, is related to the missing elements from 4.4.1.  This is the first I have known of this issue.  How can we be notified to prevent us from installing a version that might be unstable?  Anyway, if you have other ideas regarding my email issue, I would appreciate your response.  In the meantime, I am awaiting a reply from ByDesign.