DotNetNuke Action Menu Error

I'm using DotNetNuke 5.3. I add one menu item in ModuleActionCollection. Then I add this page to Module definition also. But I got this error:

Error: is currently unavailable.

DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.UI.Modul开发者_如何学运维es.ModuleHost.LoadModuleControl() --- End of inner exception stack trace

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Are you using the ModuleActions property from the IActionable interface? Can you attach a debugger to that property and see if the NullReferenceException is happening in there? If you remove the IActionable interface from the module, does that get rid of the error?

Can you provide your implementation of ModuleActions?