Call adapter in receiver idoc

Hi Experts,

I have a flat file to IDOC scenario. I'm facing a following error in integration engine.

My scenario steps:

I have 3 mappings.

1) To convert the flat file to XML structure

2)Mapping conditions in second step

3)XML to IDOC structure.

In third step in target side(IDOC side) i mapped the following fields SNDPOR,SNDPRT,SNDPRN,RCVPOR,RCVPRT,RCVPRN, with certain conditions. I tried with both successful failed messages. Both times i'm getting the same output in the IDOC output,But in the IE in that CALL ADAPTER step i'm getting the above error as shown in the image. In the receiver call adapter i configured as shown in the below image

What will be the reason for the failure of this message. In the above communication channel the 2nd,3rd and 4th check boxes what they mean...

As far as i understand take sender from payload means it takes the sender value from the source payload but how it'll take with out defining the path or will it take when the mapping step is over in the receiver side idoc. Please clarify this confusion.

I hope someone can answer this.......

Thanks in advance

satish.