Error in merge statement when trying to impliment SCD type 2 using merge...

Msg 207, Level 16, State 1, Line 40

Invalid column name 'Current'.

Msg 207, Level 16, State 1, Line 38

Invalid column name 'Current'.

Msg 207, Level 16, State 1, Line 47

Invalid column name 'Current'.

Here is the code below...

--Create Temporaty table to hold dimension records 

IF OBJECT_ID('tempdb..#DimVirtualQueue') IS NOT NULL
DROP TABLE #DimVirtualQueue;

CREATE TABLE #DimVirtualQueue
  ( [VQ_name]        [varchar](50) NULL,
	[contact_type]   [varchar](50) NULL,
	[center_node_id] [int] NULL,
	[sed_id]         [datetime] NULL,
	[eed_id]         [datetime] NULL,
	[insert_date]    [datetime] NULL,
	[Current]        [char](1) NOT NULL
	) 

INSERT INTO #DimVirtualQueue(VQ_name, contact_type, center_node_id, sed_id, eed_id, insert_date,[Current] ) 
                      SELECT VQ_name, contact_type, center_node_id, sed_id , eed_id,GETDATE(),'Y'
FROM 
  ( --Declare Source and Target tables. 
    MERGE dbo.tblSwDM_dim_VQ_test AS TARGET 
    --Source 
    USING (SELECT  
				RTRIM(LTRIM(Stage.RESOURCE_NAME)) AS VQ_name,
				'Unknown' AS contact_type,
				0 AS center_node_id,
				CONVERT(INT,CONVERT(VARCHAR(8),GMT_START_TIME,112)) AS sed_id,
				CONVERT(INT,CONVERT(VARCHAR(8),ISNULL(GMT_END_TIME,'2070-01-01'),112)) AS eed_id,
				GETDATE() AS insert_date
	       FROM dbo.tblGenesys_stg_RESOURCE_ Stage
	       WHERE resource_type = 'queue'
	         AND resource_subtype = 'VirtualQueue'
	         AND NOT EXISTS (SELECT 1 FROM dbo.tblSwDM_dim_VQ AS dim
	         WHERE RTRIM(LTRIM(stage.RESOURCE_NAME)) = RTRIM(LTRIM(dim.vq_name))) ) SOURCE
   ON TARGET.VQ_name = SOURCE.VQ_name
   WHEN NOT MATCHED BY TARGET 
   THEN 
   INSERT ( VQ_name, contact_type, center_node_id, sed_id, eed_id, insert_date,[Current] )
   VALUES (SOURCE.VQ_name,SOURCE.contact_type,SOURCE.center_node_id,SOURCE.sed_id,SOURCE.eed_id,SOURCE.insert_date,'Y')
   WHEN MATCHED AND TARGET.[Current] = 'Y' 
   AND EXISTS ( 
                SELECT SOURCE.VQ_name
                EXCEPT 
                SELECT TARGET.VQ_name
               ) 
   --Expire the records in target if exist in source. 
   THEN UPDATE SET TARGET.[Current]        = 'N',
                   TARGET.[eed_id]         = SOURCE.eed_id               
   OUTPUT $Action ActionOut, SOURCE.VQ_name,SOURCE.contact_type,SOURCE.center_node_id,SOURCE.sed_id,SOURCE.eed_id) AS MergeOut
   WHERE  MergeOut.ActionOut = 'UPDATE';
   --Insert data into dimension 
   INSERT tblSwDM_dim_VQ_test 
   SELECT VQ_name,contact_type,center_node_id,sed_id,eed_id,insert_date,[Current]  FROM #DimVirtualQueue

Any help to resolve issue is appreciated...

Thanks,

Vishal..