radius 1.1.5 not comming up

Hi I have downloaded radiis version 1.1.5. I am unable to bringup the the server. it goinf down. Please find the trace below. exec: wait = yes exec: program = "(null)" exec: input_pairs = "request" exec: output_pairs = "(null)" exec: packet_type = "(null)" rlm_exec: Wait=yes but no output defined. Did you mean output=none? Module: Instantiated exec (exec) Segmentation fault What could be the issue ? Thanks in advance. --------------------------------- Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains.