AlwaysEncrypted error when inserting via stored proc

lets start with the error first:

Encryption scheme mismatch for columns/variables . The encryption scheme for the columns/variables is (encryption_type = 'PLAINTEXT') and the expression near line '3' expects it to be (encryption_type = 'DETERMINISTIC', encryption_algorithm_name = 'AEAD_AES_256_CBC_HMAC_SHA_256', column_encryption_key_name = 'CEK_P_H', column_encryption_key_database_name = 'Payments_Hub') (or weaker)

I'm trying to insert into a column with AlwaysEncrypt encryption on using a stored procedure:

The column 'PARAMETER_VALUE' is the encrypted column

CREATE PROCEDURE dbo.SP_UI_Parameter    (@ID int OUTPUT,@OPERATION_ID int,@PARAMETER_NAME varchar(100),@PARAMETER_METRIC varchar(100),@PARAMETER_VALUE varchar(100) )ASBEGINIF @ID IS NULLBEGININSERT INTO [dbo].[TOKEN_PARAMETER] (OPERATION_ID,PARAMETER_NAME, PARAMETER_METRIC, PARAMETER_VALUE)SELECT @OPERATION_ID, @PARAMETER_NAME, @PARAMETER_NAME, @PARAMETER_VALUESET @ID = SCOPE_IDENTITY()ENDELSEBEGINUPDATE [dbo].[TOKEN_PARAMETER] SETOPERATION_ID = @OPERATION_ID,PARAMETER_NAME = @PARAMETER_NAME,PARAMETER_METRIC = @PARAMETER_METRIC,PARAMETER_VALUE = @PARAMETER_VALUEENDENDGO

Why am I getting the error for the query ?

Is there something I must include within the STORED PROCEDURE ?

1. I have included "Column Encryption Setting=Enabled " in my connection settings
2. I have also enabled Parameteterization for AlwaysEncrypted
3. The key is stored on the local machine
4. I have created DETERMINISTIC encryption
5. SQL Server 2016 database Engine using SSMS 17 - can this be an issue ?

SQL Server Version Info: (EDITED)

Microsoft SQL Server 2016 (SP1-CU7-GDR) (KB4057119) - 13.0.4466.4 (X64) Dec 22 2017 11:25:00 Copyright (c) Microsoft Corporation Enterprise Edition: Core-based Licensing (64-bit) on Windows Server 2016 Datacenter 10.0 (Build 14393: ) (Hypervisor)

SSMS Stored Procedure Call: (EDITED)

DECLARE @return_value int,@ID intEXEC    @return_value = [dbo].[SP_Insert_Parameter2] @ID = @ID OUTPUT, @OPERATION_ID = 3, @PARAMETER_NAME = N'algorithm', @PARAMETER_METRIC = N'algorithm', @PARAMETER_VALUE = N'99999' SELECT @ID as N'@ID' SELECT 'Return Value' = @return_value GO

Thanks In Advance