Problem monitoring BPM

Hi Friends

I have made the File to File scenario using BPM ,

I can se the file is being picked up by the sender cc , but no further things happened

When I try to monitor the BPM wih SXMB_MONI_BPE it says no work item exists.

I can se message in SXI_MONITOR , but when I click in the tab PE it shows 0 in the number of queu and number of entries displayed

Do i need to do any settings before executing any BPM scenario?

Please let me know.