I use DNN 04.03.04

I have upgraded my document module to 4.0.0, but can't load the module get the following message:

Unhandled error loading module.
DotNetNuke.Services.Exceptions.ModuleLoadException: Unhandled Error Adding Module to ContentPane ---> DotNetNuke.Services.Exceptions.ModuleLoadException: Error: Test is currently unavailable. ---> System.Web.HttpCompileException: d:\web\kos-sejlsport.dk\www\DotNetNuke\DesktopModules\Documents\Document.ascx(10): error BC30451: Name 'IsEditable' is not declared. 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 --- at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(String FriendlyMessage, PortalModuleBase ctrlModule, Exception exc, Boolean DisplayErrorMessage) at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(PortalModuleBase ctrlModule, Exception exc) at DotNetNuke.UI.Skins.Skin.InjectModule(Control objPane, ModuleInfo objModule, PortalSettings PortalSettings) --- End of inner exception stack trace

Any ideas what is wrong, I'm a newbie ;-)

Thomas

Thanks for the answer

How do I downgrade. When I try uploading version 03.03.08 it says it's an old version

OK.

Here is my problem with this.

When you go in as HOST and you look at the module definitions--the icon next to the documents module reads "UPGRADE AVAILABLE". 

So if you upgrade, and you are pre-whatever--the docments module is toast and because there was no README, or any warning, or any pre-requisite check or safeguard of any kind--a site restore has to be performed? No simple way to back out a change? Sorry...that's not even good quality software.

If it doesn't affect anything else-I would eschew the documents module completely and use something else.