amiko sdhs 8820 problem

Hi All,
I recently upgraded my internet to a 50mhz service which seems to have left me with a problem with my amiko sdhd 8820. If I am on a FTA channel for say 20 minutes and change to a channel which requires a connection to the net the box will need to be rebooted in order to restore pictures. There is n0 problem if I leave the box on channel which requires net connection. I did not have this problem when I had a 10 Mhz service from the same provider.
Thanks in advance.