Report for Expired Credit Card Authorizations on Sales Orders

I've searched through various posts and cannot seem to find an answer to a simple, specific question. Hopefully, someone can provide some input.


I have created a very simple Crystal report, using the SO_SalesOrderPayment table. I want the report to tell me which open sales orders have credit card authorizations that have expired. However, I cannot figure out how to have the report show me only those records (orders) that have an "AuthorizationDate" GREATER than 7 days (our system-set PreAuth term). Thoughts?  Thanks!

T. Helm