When i making a Scheduled playlists,  he plays normal but after 3 songs they don't  playing Interval
with ower station identification or commercials.

The same by making  M3U playlists, they don't  playing Interval also not.

Is there a solution for this.

Thanks

There's no solution to this right now. This is just how our playlist system was designed to work, so this is the intended behavior. We do plan on adding more flexibility, so this feature will likely get implemented in one of the future Centova Cast versions.