Processing delay in MII

Hi,

At one of our customer Plants there is a issue with delayed processing, there is a transaction "Txn_Schedule_ReplacePCo_Trigger " which is scheduled to run every 6 seconds.First thing this transaction does is to write to the MII Logger with the following message :

Production Order Complete or Partial Confirmation u2013 Pco Txn has been triggered.

After it has processed, it writes the following message to the MII Logger: -

PCo Call for PO complete or Partial Confirmation u2013 Pco success

On the 29 03 2011 , the message PCo Call for PO complete or Partial Confirmation u2013 Pco success was written on the MII logger at 18:40:34. The next message to be written at 20:04:31 was Production Order Complete or Partial Confirmation u2013 Pco Txn has been triggered. It appears for some reason (not yet known) the PCOtrigger transaction did not run.

Looking at todays MII logger, we can see on average 5 minutes passing before the PCo trigger transaction is submitted, even though it should run every six seconds.

Can someone tell me if we are missing something here.

Thanks,

Raveen