MAX_BUFFER_SIZE negative value

Websense 7.1, ISA 2006, SQL 2005

On one of my instances, the BCP files are building up, the database will not roll over and the MAX_BUFFER_SIZE value constantly goes to a negative, even if I set it to positive.

When trying to manually roll over the DB, I get

USP_ETL_DRIVER(): Saved INCOMINGBUFFER_OFFLINE content

in the log.

Any help will be appreciated.

Thanks