Refreshing listners in Business Connector

hi guys,
we are testing a few breakdown situations. once we send an idoc from SAP without the BC running, the IDOC is sent to port succesfully from SAP but after we start BC, the IDOC is not received at all, even though the listener setup for receiving is set to check every 1 min. We need to enable BC to receive all the IDOCS that were sent during the time that BC was not up!! please give your inputs on this,

thanks a ton