no "on air" on 1.8

Hi all
I said yesterday , I had upgrading from 1.6 to 1.8 ( in fact installing from scrach)

But now , my server is on time, but scheduled program display playing and not be on "air" .

And I am streaming silence....

Tell why, because , exept installing a fresh 1.8 ( 1.6.1 was in home) I do nothing in particular..

(see attached)