Custom Action Safe Control 2007

Question

In extension to this question of mine, If I put location of custom action as

"Location="Microsoft.SharePoint.StandardMenu"

it gives me error

Failed to create a control from assembly '', class '': The control with assembly name '', ' class name '' is not allowed for web at URL ''. The type is not registered as safe.

however it works for most I tried in here

Edit

Elements.xml

<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <Control
  ControlAssembly="abc3333.myworkspacename, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d702315f0f3475cf"
  ControlClass="abc3333.myworkspacename.FeatureFolderName.ClassName"
  Sequence="1"
  Id="AdditionalPageHead"/>

  <CustomAction
      Id="CustomActionName"
      Title="My Custom Action 2"
      Location="Microsoft.SharePoint.StandardMenu"
      RegistrationId="101"
      RegistrationType="List"
      GroupId="ActionsMenu"
      ImageUrl="/_layouts/images/abc.gif"
      ShowInLists="TRUE"
      Sequence="1000"
      ControlAssembly="abc3333.myworkspacename, Version=1.0.0.0, Culture=neutral,                        PublicKeyToken=d702315f0f3475cf"
      ControlClass="abc3333.myworkspacename.FeatureFolderName.ClassName">
  </CustomAction>

</Elements>

Now If I remove ControlAssembly or ControlClass from CustomActions then it stops giving me error and shows my new action in action menu but then I won't be able to do any action, now if I change location and groupId and keep assembly in it then it does work as well.

So I guess GroupID "ActionsMenu" doesn't take control assembly as safe control or something, I think I am missing some concept.

Answer 1

My User control class wasn't declared as public, so WSP Builder wasn't adding it as a safe control to web.config neither in Manifest.xml.

Many thanks to comments in this Article by Terry R Not sure who that is personally but solved my issue :).