CKEditor .Net Security Exception

Question

I have another issue with a Security Exception, although this feels like it should be easier to solve.

I've added in to my site the CKEditor .Net library (from here: http://cksource.com/forums/viewtopic.php?f=11&t=15882)

I've included it on my page as a normal control:

<%@ Register Assembly="FredCK.CKEditor" Namespace="FredCK.CKEditor" TagPrefix="ck" %>

and put it on the page:

<ck:CkEditor runat="server" id="Editor" Width="692px" Height="400px" />

However, when I run the page, I get this message:

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

In the CKEditor .Net project, there is a strongKey file...I imagine this is where I'm going wrong somewhere, but I just can't work out where.

Any ideas from anyone please?