wm.prt.dispatch:handlePublishedInput problem

I modeling process and I’m using trigger to start process.
This trigger waits for some kind of document and subsequently calls built-in service wm.prt.dispatch:handlePublishedInput

I actually don’t know what exactly is this service doing, but I suppose it should execute other flow. Anyway my process is not starting and I get this error.

Plz help

2007-01-23 18:10:12 MET [ISS.0098.0006V2] Consumer:ACT_Activation.LS_R2D2:trigger received 1 Documents from Broker
2007-01-23 18:10:12 MET [ISS.0098.0049C] Exception:com.wm.app.b2b.server.ServiceException: [PRT.0101.9125] Service wm.prt.dispatch:handlePublishedInput faile
d while executing trigger. Rejecting Document for TriggerStore:ACT_Activation.LS_R2D2:trigger.
2007-01-23 18:10:12 MET [ISS.0098.0051V2] DefaultProducer sending document to Broker.
2007-01-23 18:10:12 MET [ISS.0098.0006V2] Consumer:DefaultClient received 1 Documents from Broker
2007-01-23 18:10:12 MET [ISS.0098.0024V2] No Trigger available for incoming Document pub.publish.notification:error. Rejecting Document