Filter and the corresponding prev. Packet

Hi @ all,
I'm searching about an "HOW-TO":

- Create an Filter with the condition:
Show me an error and the previous packet.
In this Example Novell NDS Errors:
First Expression is the Response - but I want also have
the previous corresponding packet (The Request)


Filter:
(ncp.ndsreplyerror != 0x00000000) AND ("the prevoius packet which gave
the request of this error response")

The Target is to have a List
123 - request
124 - response error
301 - request
302 - ...

Thanks for your Effort

Reagards Egbert