Unable to Ghost Cast across VLANs

We are trying to image machines across a large college campus. There is one router in the network and multiple layer 2 switches.

We have tested the network using a Multicast traffic generator and that works fine across VLANs.

Our Ghost server is able to multicast to PCs on the same VLAN that it is on, but hangs when trying to multicast across VLANs.

The clients join the session and the session starts but then just hangs. We see traffic from the clients on the port were the Ghost Server is connected and we see Multicast traffic from the server on the port where the clients connect.

We are in desperate need of assistance.

Thanks,

https://www.dropbox.com/s/wocd9mjtd3zwjn3/AHD1P116...