Mail fetching problem on SDP server

Hello to all,

we have experienced some problems with mail fetching. After some days working correctly, for some reason suddenly it stops fetching mail showing these errors on log server (error 3009):

Mail fetcing is delayed ....due to start time and finish time is ZERO

Mail fetcing is delayed ....due to schedule time=1416646769873 more than curren sys time=1416649824710, finishTime=1416646709873, startTime=1416646704087, timeToWait=1860000

Any clue about this error? Could you give us a solution?

SDP 9 Build 9017
MS SQL 2005

Thanks in advance