MSXML6.dll method"SEND" don't work in Windows Server 2012 and SQL 2008R2

Question

Hi all,
I have a SP to send a WebService data
It works fine on Windows 2008R2 server and also on Windows Server 2003.
moving it on Windows Server 2012 with SQL 2008R2 express (32bit) or SQL 2012 express (32bit), it doesn't work anymore.
Below the SP.
-- =============================================
-- Author: Giancarlo MADA Service 2008
-- Create date: 09/09/2008
-- Description: Web Service Interface
-- =============================================
CREATE PROCEDURE [dbo].[spmd_HTTPRequest]
@URI varchar(2000) = '',
@methodName varchar(50) = '', -- POST, GET
@requestBody varchar(8000) = '', -- XML Document envelope
@SoapAction varchar(255),
@UserName nvarchar(100), -- Domain\UserName or UserName
@Password nvarchar(100),
@responseText varchar(8000) output
as
SET NOCOUNT ON
IF @methodName = ''
BEGIN
select FailPoint = 'Method Name must be set'
return
END
set @responseText = 'FAILED'
DECLARE @objectID int
DECLARE @hResult int
DECLARE @source varchar(255), @desc varchar(255)
EXEC @hResult = sp_OACreate 'MSXML2.ServerXMLHTTP.6.0', @objectID OUT
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'Create failed',
MedthodName = @methodName
goto destroy
return
END
-- open the destination URI with Specified method
EXEC @hResult = sp_OAMethod @objectID, 'open', null, @methodName, @URI, 'false', @UserName, @Password
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'Open failed',
MedthodName = @methodName
goto destroy
return
END
-- set request headers
EXEC @hResult = sp_OAMethod @objectID, 'setRequestHeader', null, 'Content-Type', 'text/xml;charset=UTF-8'
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'SetRequestHeader failed',
MedthodName = @methodName
goto destroy
return
END
-- set soap action
EXEC @hResult = sp_OAMethod @objectID, 'setRequestHeader', null, 'SOAPAction', @SoapAction
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'SetRequestHeader failed',
MedthodName = @methodName
goto destroy
return
END
declare @len int
set @len = len(@requestBody)
EXEC @hResult = sp_OAMethod @objectID, 'setRequestHeader', null, 'Content-Length', @len
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'SetRequestHeader failed',
MedthodName = @methodName
goto destroy
return
END
-- send the request
EXEC @hresult = sp_OAMethod @objectID, 'send', NULL, @requestBody
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'Send failed',
MedthodName = @methodName
goto destroy
return
END
declare @statusText varchar(1000), @status varchar(1000)
-- Get status text
exec sp_OAGetProperty @objectID, 'StatusText', @statusText out
exec sp_OAGetProperty @objectID, 'Status', @status out
select @status, @statusText, @methodName
-- Get response text
exec sp_OAGetProperty @objectID, 'responseText', @responseText out
IF @hResult <> 0
BEGIN
EXEC sp_OAGetErrorInfo @objectID, @source OUT, @desc OUT
SELECT hResult = convert(varbinary(4), @hResult),
source = @source,
description = @desc,
FailPoint = 'ResponseText failed',
MedthodName = @methodName
goto destroy
return
END
destroy:
exec sp_OADestroy @objectID
SET NOCOUNT OFF
The underlined portion is the one that gives error, reported below.
"Msxml6.dll 0x80070057 The parameter is incorrect. Send failed POST"
Previously the SP used MSXML3.dll and also with that it gives the same problem.
I can't understand what the wrong parameter is.
Even because, as mentioned at the beginning, everything works fine on windows server 2008R2 and Windows Server 2003
Some ideas?

Answer 1

Hello, 
We have built a dll via CLR on the database. 
Below is the code.
If you want to send the file SOAP.dll. Give me an e-mail ..
USE MydatabaseGO
/****** Object: SqlAssembly [SOAP] Script Date: 03/05/2014 12:59:14 ******/
CREATE ASSEMBLY [SOAP]
AUTHORIZATION [dbo]
FROM MyPath\SOAP.dll
WITH PERMISSION_SET = EXTERNAL_ACCESS
GO
USE Mydatabase
GO
/****** Object: StoredProcedure [dbo].[spmd_HTTPRequest3] Script Date: 03/05/2014 12:53:32 ******/
CREATE PROCEDURE [dbo].[spmd_HTTPRequest3]
@URI [nvarchar](4000),
@methodName [nvarchar](4000),
@requestBody [nvarchar](4000),
@SoapAction [nvarchar](4000),
@UserName [nvarchar](4000),
@Password [nvarchar](4000),
@responseText [nvarchar](4000) OUTPUT
WITH EXECUTE AS CALLER
AS
EXTERNAL NAME [SOAP].[StoredProcedures].[spmd_HTTPRequest3]
GO
Now call the new SP called spmd_HTTPRequest3
By..