My new Sony 4k tv does not pick up the Buffalo PBS station WNED.

I am in west end Toronto, with a DB4E antenna mounted about 30 feet up on the roof peak of my two story house. It is grounded, with no amplifier or booster of any kind. A channel scan on my 6 year old Samsung HD tv picks up the usual Toronto and Buffalo channels, including WNED (17-1) from Buffalo no problem (the simple bar graph graphic shows signal strength around 40 - 50% for this station, but the picture is fine).

But when I change the same antenna cable from the old tv to the new Sony, I get all the same channels *except* WNED. Looking for suggestions on...
1. Why no PBS station on my new tv?
2. Is there anything I can try to get PBS again?