Roaming and airplay/home sharing

I have a wifi roaming network with two Dlink dir-600, one of them set to accesspoint mode and the other as normal router with dhcp. They are connected by wire. Ipad and other devices change base stations pefectly and seamless.

My problem is apple devices cant communicate via homesharing or airplay when one device (apple tv) is connceted by wire and the other device (ipad) with wifi to the accesspoint base station. But, it strangely works when the ipad is connected with wifi to router base station. It also works when both the apple tv and ipad are connected with wifi to the access point base station, but then on the other hand I cant connect to a wired computer with home sharing....

What can I do to solve this?

/Erik