SSIS process data that has special characters

Hi I am having difficulties with hidden characters.

I have the following and need to transfer this data to a .txt file. The query after the union works fine but the first one just wont pass through to the destination. If I put the query in a variable I get an error that there is invalid characters in the data. Please assist this line definately has to be part of the output

SELECT 
'Col1, ' + 'Col2, ' +'Col3, '  +'Col4'  as col1
union
SELECT		
			CAST([Col1] AS CHAR(6)) + 
			CAST([Col2] AS CHAR(2)) + 
			CAST([Col3] AS CHAR(4)) + 
			convert(varchar(7),convert(decimal(18, 2), [Col4])) 
FROM tabel1;