Mediatomb says it doesnt cant read external hd

[burntresistor]

I'm using 9.10 .I installed mediatomb from packet manager and it works when I point it to my video folder. When I point it to my external hd which I hold all my media on it says it doesn't have permission to acesss in the error message.
(couuld not list directory /media/411C80AC517E1FE9 : Permission denied)
the drive is a Western digital my book

[fallendraven]

try sudo mediatomb in the terminal. That helped me.