how to give condition

hi,

i am creating 1 SSIS package.

there is one oledb source,which getting data from product table.

productid        name

1             pen

2              pen1

3              pen3

...........

now from OLEDB source i have 1 excel destination and flat file  destination.

what i want to do is if productid > 4 that rows shouls go into excel sheet and if there is problem with data i need to move that to flat file destination.

please help