Beyonwiz V2 screen blackout when changing channels on new Sony TV

[sonycrt]

We just upgraded to a new TV (Sony 48 A90k) connected to V2 via HDMI.  The V2 seems to be working normally, however when you change channels, there is the normal pause on the V2, but then the TV goes back for an additional second. It appears the TV is re-synching with the V2 on every channel change.  Is anyone aware of a setting in the TV or V2 to prevent this delay?  Thanks

[sonycrt]

OK I worked out the problem ... AV Setup > AV Settings > Automatic Resolution ... needs to be deselected