How to block Sales order for any overdue balance.

There is a need to change SAP setting for blocked Sales Order for due balance. Current SAP setting : block is valid only for "over due

more than 30 days".

The requirement is to block order based on any overdue amount say For example : if we have due balance for 1 day, than system should block the SO.

In current credit management settings applied, there is Static check ( C ) and Oldest open item (C ) with Days oldest item =30 days. Kindly suggest as what changes should be made to reflect the desired changes. Also , help in confirming the thought that Static check itself considers the OPEN ITEMS, so if i am activating static check and REMOVES THE OLDEST OPEN ITEm, will it take any overdue amount automatically and block subsequently. To add to it kindly explain, what is the use of this additional check of Oldest Open Item ( with days = X days ) for creit mngt. can't we maintain it by Static check.

Kindly guide as what to change in OVA8 to have this. All feeedbacks are highly appreciated.