Component has no available input columns

I have a OLE DB Source and Flat File Destination in my DFT

SET NOCOUNT ON 
-- script to show if the FreeSpaceGB <= 1 GB for C:
-- and <= 20GB for drives not equal to C:
IF EXISTS (SELECT * FROM tempdb.dbo.sysobjects WHERE ID = OBJECT_ID('tempdb..#ServerName') )
DROP TABLE #ServerName
SELECT DISTINCT servername into #ServerName FROM DiskFreeSpace
IF EXISTS (SELECT * FROM tempdb.dbo.sysobjects WHERE ID = OBJECT_ID('tempdb..#DiskFreeSpaceT') )
DROP TABLE #DiskFreeSpaceT
CREATE TABLE #DiskFreeSpaceT(
	[ServerName] [varchar](50),
	[DeviceID] [varchar](21), 
	[SizeGB] [numeric](18, 2),
	[FreeSpaceGB] [numeric](18, 2),
	[InsertDate] [datetime]
) 
DECLARE @svrn char(25)
WHILE exists (SELECT top 1 servername from  #ServerName )
begin
	select @svrn = servername from #ServerName
	delete FROM #ServerName where servername = @svrn
	insert INTO #DiskFreeSpaceT 
	SELECT ServerName,DeviceID,SizeGB,FreeSpaceGB,InsertDate 
	from DiskFreeSpace	
	where ServerName = @svrn and DeviceID = 'c:' and FreeSpaceGB <= 1.6 -- 1
	and CONVERT(varchar(10),InsertDate,101) = CONVERT(varchar(10), GETDATE(),101)
	union ALL
	SELECT ServerName,DeviceID,SizeGB,FreeSpaceGB,InsertDate 
	from DiskFreeSpace 
	where ServerName = @svrn and DeviceID <> 'c:' and FreeSpaceGB <= 100 -- 20
	and CONVERT(varchar(10),InsertDate,101) = CONVERT(varchar(10), GETDATE(),101)
end
SELECT ServerName,DeviceID,SizeGB,FreeSpaceGB,InsertDate from #DiskFreeSpaceT order by servername, DeviceID

My SQL Code In OLE DB Source is as follows and I am not able to see the columns in the Flat File Destination

Here is the image

The picture is too big but I hope it explains the point.

Thanks.