MvcContrib.Castle Meduim Trust & Signed Assemblies

I have a class library which references MvcContrib.Castle. My Assembly is signed, but will not compile

error

Error 129 Assembly 开发者_JAVA百科generation failed -- Referenced assembly 'MvcContrib.Castle' does not have a strong name

I have tried added to the AssemblyInfo.cs

using System.Security;
[assembly: AllowPartiallyTrustedCallers]

the issue persists.

I have tried the following too: http://paulwideman.com/softwareartist/tag/medium-trust/

Anyone know what todo?

if it helps im using .net 4

many thanks in advance

You can sing MvcContrib dlls without rebuilding them, for example with this tool: http://signer.codeplex.com/