How to have a credit block in sales order

Hi All,

1) as soon as a sales order is created it is going in credit block. What can I do so that the  sales order is not in credit block as soon as it is created ?

2) Some orders do not go into credit block. I want sales orders to go into credit block as soon as it is created. how to do it ?

3) what happens when we release a credit block in VKM3. What all areas are impacted, like what values are changed in FD32 and by what amount ?

regards

Pamela/