Audit Trail for documents - Urgent

Hi,

We have a problem with Audit trail.

Audit trail for documents in SPL Screening is not getting updated.

Though audit trail for business partner is getting updated, the same is not happening for documents.

I checked in control settings for SPL Screening Service in Customizing and the settings are being maintained for writing entry to audit file.

Am i missing any settings anywhere?. Plz advice

Regards

Vivek