Problem Creating Stored Procedure From A Library, DLL

I'm having a problem creating Stored Procedure from a library I have created. I have found that the Create Assembly query causes the Assemby to be placed into the Master Database's Assembly collection. The other is that the Create Procedure Query states that it cannot find the type in the assembly. Can someone see what is going on and let me know

I have also changed the "struct" to a "class" and I get the same error message.

I've included the code snippit, and queries belows:

using System;
using System.Collections.Generic;
using System.Text;

using Microsoft.SqlServer.Server;
using System.Data.SqlClient;
using System.Data.SqlTypes;

namespace HHLibrary
{
[Serializable]
public struct State
{
[SqlFunction(Name = "GetStateIndexByName",
IsDeterministic = true,
DataAccess = DataAccessKind.Read)]
public static SqlInt32 GetStateIndexByName(SqlString Name, out SqlByte StateIndex)
{
SqlInt32 iResult = 0;
StringBuilder sb = new StringBuilder(500);
SqlCommand command = new SqlCommand();

StateIndex = 255; // Set the output parameter to an illegal value

. . .

return iResult;
}

}
}



************************ Compilation Messages ******************************************

------ Build started: Project: HeadHunterLibrary, Configuration: Debug Any CPU ------
C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Csc.exe /noconfig /nowarn:1701,1702 /errorreport:prompt /warn:4 /define:DEBUG;TRACE /reference:C:WINDOWSMicrosoft.NETFrameworkv2.0.50727System.Data.dll /reference:C:WINDOWSMicrosoft.NETFrameworkv2.0.50727System.dll /reference:C:WINDOWSMicrosoft.NETFrameworkv2.0.50727System.Xml.dll /debug+ /debug:full /optimize- /out:objDebugHeadHunterLibrary.dll /target:library State.cs PropertiesAssemblyInfo.cs

Compile complete -- 0 errors, 0 warnings
HeadHunterLibrary -> C:HHLibrariesHeadHunterLibrary.dll
========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ==========



************************ Trans-SQL Query ******************************************

create assembly HeadHunterLibrary
FROM 'C:HHLibrariesHeadHunterLibrary.dll'
WITH PERMISSION_SET = SAFE;
GO

CREATE PROCEDURE dbo.GetStateIndexByName
( @Name nvarchar(25),
@StateIndex tinyint
)
AS EXTERNAL NAME HeadHunterLibrary.State.GetStateIndexByName;
GO


************************ Messages From Executing The Query ************************************

Msg 6505, Level 16, State 1, Procedure GetStateIndexByName, Line 2
Could not find Type 'State' in assembly 'HeadHunterLibrary'.