Data flow task failed while tranferring data from OLEDB to XLSB,

Dynamically I created a Excel sheet by 2 SQL tasks .

 1st SQL task: Select top 1 column1 from table( Result:ALLEG27012013 (nvarchar),

This resul tset assigned=@vFILENAME)

2nd SQL task: created Excel sheet( excel connection manager expression:@vFILEPATH+@vFILENAME)

Two tasks succeeded created Excel sheet in XLSB extension

but Data flow task failed (2nd image).

Thanks

Please do help

--MADHU