Default [Q] Why wont 4.4.2 download OTA?

I have my Nexus 7 wifi edition here on KRT160 (4.4.0) after i flashed it from the Nexus Root Toolkit. I am trying to update over the air to KRT49H (4.4.2) and it refuses to download! When i go to About Tablet < System Update it just tells me "waiting to download" and then after about 1 minute it just says "couldn't download". What problem would be causing this and does anyone have a suggestion on how to fix it?

Side note: The reason I didnt originally just flash KRT49H from the Nexus Root Toolkit is because it doesnt flash properly. It always gives me a unknown chunk type error. KRT160 is the only build that seems to want to flash correctly to my device.
Current Devices

Moto Razr M (Stock 4.4.2)Main Phone
Moto Droid X2 (CM10 4.1.2)
Samsung Facinate(CM10.1 4.2.2)
2013 Nexus 7 (Stock Android L preview)
Chromecast