IDoc status stucked at status 64

Hi gurus,

I have created an custom inbound FM for PO processing, copied from IDOC_INPUT_ORDERS for saving the IDoc details into custom table instead of processing it using any VA transaction, example:

The IDoc is process successfully, however, it stucked at status 64, I had checked we20 'Trigger Immediately', I have tried all notes mentioned in https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=356423019, this is the current we42 configuration, I also tried putting 'INPUTFINISHED' at end event,

Could any master please enlighten me on whats the mistakes I have made? Thank you very much