UdateGram issue

Hi,

I am new to biztalk. Could any one tell me how can I use multiple "after" block in the biztalk updategram? I try to use looping with my Flat file schmea header and the SQL adaptor schema's after block. I am getting following error:

Out of sequence before or after elements are not permitted inside a single sync block. If there is more than one of these, every before block must be followed by an after block.

I noticed that I have more than one after blocks under the one Sync block. I read somewhere that we can have many after block with in one Sync. Then Y i am getting this error?

Should I have to add before block manually if i want multible after blocks? how to add? 

I used updategram to create the SQL Adapter Schema.

Thank you in advance,

Siva