hello kali users!

recently i have been trying to get postgresql to work. but unfortunately, it dont!

in terminal, i type

service postgresql start
but what i get as response is

[....] Starting PostgreSQL 9.1 database server: main[....] The PostgreSQL server[FAILed to start. Please check the log output. ... failed!
i have chekced the log. but it is empty!

hope someone help me