Can't Receive Message From Queue (Async Trigger)

Hi Folks,

I've found a pretty good code example on http://www.dotnetfun.com for a Asynchronous Trigger.

I've parsed through the Code, to understand how to wirte my own Async Trigger with a Service Broker, but the Code isn't working! It seems that the stored procedure don't receive the messages in the queue, but the queue get's filled.

MessageType


 CREATE MESSAGE TYPE  myMsgXML
 VALIDATION = WELL_FORMED_XML;
Contract

CREATE CONTRACT myContractANY
 (myMsgXML SENT BY ANY)
Queue

CREATE QUEUE myQueue
 WITH STATUS = ON,
 RETENTION = ON,
 ACTIVATION
 (
  STATUS = ON,
  PROCEDURE_NAME = sp_myServiceProgram,
  MAX_QUEUE_READERS = 5,
  EXECUTE AS SELF
 )
Service

CREATE SERVICE myService ON QUEUE myQueue  (myContractANY)
Procedure (greped from http://www.dotnetfun.com/)

CREATE PROC sp_myServiceProgram
AS
-- This procedure will get triggered automatically
-- when a message arrives at the
-- Let's retrieve any messages sent to us here:
DECLARE @XML XML,
  @MessageBody VARBINARY(MAX),
  @MessageTypeName SYSNAME,
  @ID INT,
  @COL2 VARCHAR(MAX);
DECLARE @Queue TABLE (
  MessageBody VARBINARY(MAX),
  MessageTypeName SYSNAME);
WHILE (1 = 1)
BEGIN
 WAITFOR (
  RECEIVE message_body, message_type_name
  FROM myQueue  INTO @Queue
 ), TIMEOUT 5000;
 -- If no messages exist, then break out of the loop:
 IF NOT EXISTS(SELECT * FROM @Queue) BREAK;
 DECLARE c_Test CURSOR FAST_FORWARD
  FOR SELECT * FROM @Queue;
 OPEN c_Test;
 FETCH NEXT FROM c_Test
  INTO @MessageBody, @MessageTypeName;
 WHILE @@FETCH_STATUS = 0
 BEGIN
  -- Let's only deal with messages of Message Type
  -- myMsgXML:
  IF @MessageTypeName = 'myMsgXML'
  BEGIN
   SET @XML = CAST(@MessageBody AS XML);
   -- Now let's save the XML records into the
   -- historical table:
   INSERT INTO tblDotNetFunTriggerTestHistory
    SELECT tbl.rows.value('@ID', 'INT') AS ID,
     tbl.rows.value('@COL2', 'VARCHAR(MAX)') AS COL2,
     GETDATE() AS UPDATED
    FROM @XML.nodes('/inserted') tbl(rows);
  END
  FETCH NEXT FROM c_Test
   INTO @MessageBody, @MessageTypeName;
 END
 CLOSE c_Test;
 DEALLOCATE c_Test;
 -- Purge the temporary in-proc table:
 DELETE FROM @Queue;
END
Send Message in a Update Trigger

SELECT @XML = (SELECT * FROM inserted FOR XML AUTO);
  -- Send the XML records to the Service Broker queue:
  DECLARE @DialogHandle UNIQUEIDENTIFIER,
   @ConversationID UNIQUEIDENTIFIER;
  /*
   The target Service Broker service is the same
   service as the initiating service; however, you
   can set up this type of trigger to send messages
   to a remote server or another database.
  */
  BEGIN DIALOG CONVERSATION @DialogHandle
   FROM SERVICE myService
   TO SERVICE 'myService'
   ON CONTRACT myContractANY;
  SEND ON CONVERSATION @DialogHandle
   MESSAGE TYPE myMsgXML
   (@XML);
  -- Let's detect an error state for this dialog
  -- and rollback the entire transaction if one is
  -- detected:
  IF EXISTS(SELECT * FROM sys.conversation_endpoints
   WHERE conversation_handle = @DialogHandle
   AND state = 'ER')
   RAISERROR('Dialog in error state.', 18, 127);
  ELSE
  BEGIN
   --I want to list the queue after the trigger so I disabled
   --END CONVERSATION @DialogHandle;
   COMMIT TRAN;
  END
The Problem is, that the Procedure doesn't even get started! So I tried to receive the Queues manually

WAITFOR (
  RECEIVE message_body, message_type_name
  FROM myQueue  INTO @Queue
 ), TIMEOUT 5000;

and I run always into the timeout and get nothing back. A Select * FROM myQueue gives me some results back. Why I can't recevie?
Would be grateful for help, or at least a good tutorial, I haven't found one yet....
thx and greez
     Karsten