Can't see Stream Files in administration console !!

I have created a new Directory called "mydir" into the Application Directory Of Flash Media Server.
I copied my "mydir.flv" file into ths directory.
But :

Problem 1 : I can't see this file in the Stream Section of the Administration Console.
Problem 2 : I can't access the adress : rtmp://localhot/mydir/mydir.flv

Please, help me since I must have forgoten some essential steps in my Server Installation process.

Thanks