Not able to validate the AP invoices using Invoice Validation standard program and the program never

Hi,
When we are validating all the ap invoices using Invoice Validation standard program.It was taking time for hours and when we terminated the program , the status of the invoices changed to Selected for validation.
We applied a datafix patch 9327208 . Upon applying we got the status of the invoices changed from Selected for validation to Never Validated.

Now again when we ran the invoice validation program, the program is running in loop because from the front end when i try to find all these invoices, it status will show as Never  Validated and then after a minute it shows as Selected for validation and the Invoice Validation standard program is running for error.