Problem using RxLog

I can’t seem to figure out how to get RxLog macro to work. I’m using
build 3790 for a FSD built using the mini-rdr. I made sure that RDBSSLOG
is defined when compiling the my FSD and that the macro is calling
_RxLog. After hacking into _RxLog I realized that maybe I need to set an
extern variable called EnableWMILog in my FSD. But even after I do that,
I get the following output on softice :

“RxLog : Wrap logic has fail…log disabled”.

Could anyone help figure out what’s going on ? How can I make _RxLog to
work for me. Where should the output appear ?

Thanks a lot for anything that points me in the right direction.