Logging Access-Request and Access-Accept Pairs

Hi List: I need to log successful access-request and access-accept radius pairs. This is 2.1.9 version of free radius. This is working as proxy and here I am logging. I have all the logging code and everything the only thing is when there is access-challenge there are multiple access-request which I want to avoid logging. Is there way using functions in packet.c or radius.c to log things only once for successfull access-request and access-accept pairs. Thanks in advance. -Gyanendra