radwho radzap problem

Hello, I am using rlm_perl script for authentication. And logging radacct in sql. But it is strange that, i couldnt use radwho radzap radlast etc for a while.. had the error "file not found" etc.. So i manually created the files with touch. Now i can see theres records inside files, but still i cant see any data with radwho or radlast commands. And also, i can not zap staled sessions too with radzap, even i tried to clean sql log with a cleanstale.php script , some of my users still seem online. I am attaching the radiusd.conf file and i wonder if smbody can help me about this situation. Thanks a lot.